I have that sub (1/60). I hope to have it operational by next summer. I my be able to give you some ideas.
the one that I am building, I wanted to try something different.
I built the interior housing empty and sealed it. This way you dont have to find or build a custom box. Plenty of space for rx, batteries, two servos and motors. I'll post some pics if that is the direction you wish to proceed.
Also Lunar models makes a 14 in wing span Fling Sub. Vac-u-form model. The one in the picture eariler is that model.
Look at members web pages (Mar7ck)
Edited By mar7ck on 1161226471
The Small Sub Guy