I just built this.
Limited edition kit #168.
I've had it for a very long time, and each time I looked at the manual, I just put it away again...
The big issue was the tapered tank and the bands.
I just bit the bullet now and built it!
The base was rather easy to build.
To solve the tapering of the scale 8"x 2" planks, I made a fixture in my 3D printer.
The planks was to be reduced by 1/64" on one end... So a good fixture was crucial.
I taped the planks before removing them from the fixture. That's so I didn't mix the small and big ends.
I stained them while taped.
The wood was then glued to the cardboard tank base.
I only had to trim some of them to get good vertical alignment.
All in all a very nice kit.