RE: ZDZ 40 RE F3A Soft Mount
No - having been though the soft mount thing many times (too many) I decided that the best bet for the engine was a wooden fuselage and a absolutely twist/vibe free dead solid, mount to wing tube attachment and rigid aft fuselage . This setup is called mas balancing - trying to make the entire model damp any movement. The ZDZ ignition really does soften the blows on this engine . different than glow ignition
very different.
The glass models are like violins - they will amplify any noise . but they also can have a cradle built in which is rotating at front and rear of engine
personally I don't care for the all glass stuff - way too much money and the "fixed" nature of them puts me off.