I designed this to fit a 24mm "E" size engine into mech-G's 1/25 scale V2 model.
https://www.thingiverse.com/thing:2496074
It uses the 24 mm retainer from aslansmonkey's version of the V2 to lock the engine in place.
https://www.thingiverse.com/thing:6283929
Print the mount upside down to avoid the need for supports.
EngineMount.stl | 943.9KB | |
MotorRetainer24mm.stl | 50.1KB |