MTK:
I will not rehash old material here. Search and find if you want. Study what I teach and learn if you want.
LOL! Really? Arrogance, party of one, your table's ready..

I'm not 'searching' for anything, especially from one with such a 'know-it-all' approach, so hop off the high horse.
While commercial soft mounts may not work for everyone, to characterize them as 'junk' indicates a simplistic and prejudiced attitude. How do you account for their sustained popularity? I've had great success with them.
Are you an engineer or vibration specialist? It just so happens my flying bud's wife works in that field, and she and her coworkers have helped him dial in his pattern planes' soft mounts. So thanks, but I'll stick with quality info from actual experts. They're pretty humble too, BTW.