[chrisguyw]

How do the hard bodies fix to the top plate, not the existing body posts I suppose

Still working on potential options.............one option is to use foam blocks glued to the inside of the body and then an "L" shaped bracket glued to these blocks, and screwed to the chassis plate. This is common on the Plafit type chassis of both 1/32 and 1/24........works very well.
This option will require a completely redesigned top plate, and "L" brackets.

The second option is to build some mounting holes into the chassis plate, which will then be screwed to typical body posts............either way,  the existing body posts will likely not line up, and will either need to be moved/added.




Cheers
Chris Walker