Dingo:

The beam mounts work fine, a soft mount works better.

If your planes last no more than a yeaar or two, go with the beams.

But.

You are getting set to put a shaky engine on the plane, the soft mount just makes it last longer by isolating the vibration.

Even a two stroke engine will vibrate, and over a period of time the beam mounts will be crushed and become fuel contaminated.

Using just an ordinary reinforced plastic mount will prevent the crushing and soaking, so even if you don't spend the money for a soft mount you can have great benefits by not using the wooden beams.

But if your planes only last a year or two...

Bill.