Ban Dai’s O TESTER SEABASE/COMMAND CENTER

O TESTER Seabase Command Center

by BAN DAI
A Sea base, Land base, any model that equals a potential diorama – I love it! I’ve had this model for a while, and I don’t know too much about it, because the box cover and all instructions are all in Japanese. A date found on the instructions is 1999. I have completed a few land bases previously; a Macross, Thunderbird, and a Space 1999 Alpha Moon Base,, which I previously blogged on, …so I thought this would be interesting and challenging.

Instruction Sheet A

Mini Flying Craft Assembly
As well as the large 13 1/2 inch watercraft with many parts, the craft comes with four mini O Tester flying craft # 1,2,3 and 4.

As I did not find color information reference online for the large watercraft, I decided to follow the very colorful illustration on the box top – which was shown above. Also, a couple of the mini flying craft are shown in the illustration, but not the others. By looking up ‘Ban Dai O Tester’ on eBay, I found that there are other larger models, that you could purchase, of these mini ships. So I made note of the colors shown on those models online. 

Note: Reference is one of the most important things in creating your model, unless you are designing and scratchbuilding your own model.

I spray painted all the ships in a semi-gloss white acrylic and then hand painted the detail colors. When I saw the instructions above showing the numbers and identification on each vehicle, I looked for the decals – but either my model did not come with them, or possibly I misplaced them? …*#!@.


Instruction Sheet B

Instructions #3 shows the assembly of fin like hull supports, 4 propulsion hubs, and small wheels (meant for play use). The hull comes in a light blue plastic, that I didn’t like, so I finished it in a middle neutral gray, leaving the lower window areas Blue. The propulsion hubs and supports were painted in dark Gunmetal Silver, with the in and out propulsion ports being finished in Chainmail Silver. The wheels were sprayed Black. Assembly was done after all painting. Glue areas are normally scraped to the bare plastic before fusing parts.

Instructions #4 begins the assembly of Spring holders for propelling the mini flying craft (if used as a toy). Note: see also Instructions #10.

Instructions #5 is for the construction of a circular domed hanger with access (lift up front). I followed the box top for color, spraying the object parts white, and then masking when totally dried for the red areas. Inside was finished white.


Note: Most model parts were painted and detailed before securing them to the larger water craft.

Instruction Sheet C

Instructions #6 and 8

Yes, there are little mountains on this watercraft with Secret Places! One mountain has a large access door. I painted the mountain parts by hand, by using a dark Umber Brown, then dry brushing a Sepia Brown and Sepia Brown with a small amount of white to bring out the highlights, leaving the crevices and shadow areas in the Umber Brown.

Instructions #7

These instructions cover the assembly of many small parts (probably power and other ship mechanics). After assembling each little part, I spray base painted them in a Chrome Silver.

Once dry, I detailed them using White, Gunmetal and Chainmail Silvers. Color was added to a couple of parts – as shown on the box top.


The above photo shows a back/rear view of the craft’s top deck/floor with some of the power/mechanical parts installed. 

Note: Before assembling and fusing the mountains and mechanical type small parts, the base deck/floor was hand painted in an Ochre Yellow, with randomly brushed Yellow Ochre mixed with a little Sepia Brown. For a top translucent dirty look, a mixture of Umber Brown and Acrylic Medium was used which lets the under-color show through. A little Black with Acrylic Medium was dry brushed to ‘dirty-up’ some runway areas. 

Instruction Sheet D


Instructions #9

The raw plastic base deck/floor had the mechanical/power parts base shape lightly engraved into the surface, to show you exactly where to place each little part. Painting it first, I could no longer see those markings, so I just followed Illustration #9 to place each one. Note: I probably could have also made a tracing of the engraved shapes to position guide me after painting.

Illustration #10

Spring loaded parts, to catapult the mini flying craft, are highlighted in this step. Some parts are on the top deck/floor, but most are on the underside. With a little patience, I held the spring loaded little caps in place while the glue dried.


The above photo shows the deck/floor detailed, the Red and White dome positioned, the mountains in place, and some of the mechanical/power parts at the rear/back. The front runway section, shown in Illustration #10, is not installed yet in this photo. The center medical tower will be installed next, and then finally the bottom sea craft’s hull.

Instruction Sheet E

Illustration #11

All parts of the little tower top flying craft, and the medical tower were fully painted and detailed before assembling and positioning over the recessed area on the deck.

Illustration #12

This illustration shows the assembly of a runway platform section that you can raise up from the hull of the craft through the decks opening hatch doors. Note: the Last Illustration Sheet (not numbered) shown below, highlights the opening of various doors and hatches, along with the four little flying craft.

Also above, is shown the final placement of the upper finished deck, with all parts, positioned to the bottom hull.

Last Instruction Sheet

Creating a Base for our Sea Craft Command Center

A section view of the base’s construction is shown above, along with a photo below of the painted ocean I created before the clear coat, and frame finishing. The clear coat is a clear acrylic that you pour (like water) over your painting. It is liquid enough in the beginning so you can quickly smooth it out – omitting any bubbles or recesses. The base must be on a level/flat surface while applying and while the acrylic sets/dries. The clear acrylic coating comes in a bottle from Woodland Scenics. It is called “Realistic Water” …and is often used by modelers and model railroad diorama creators.



Photos of My Completed Sea Craft with Custom Base



The finished base is 10 1/2 inches x 14 5/8 inches.

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