Since I found parts of an old Tamiya Blackfoot and Frog in the cellar, I've put together a driving Frankenstein-Car with some modern parts. Just the LiPos I use for other RC stuff didn't fit very well so I made this replacement hatch.
I don't have the original pin to lock it so I use a screw. If you want to use the pin, you'd have to remove the 2 additional loops on the back (I guess that would be better anyway because it turns out my screw is not long enough :D ).
- edit: added single loop variant -
The LiPos I'm using this for are roughly 3,5 x 2,5 x 10,5 cm.
FreeCAD file is included.