I went with Hyde soft mounts. I used them on my 120" Grumman Widgeon, hasn't flown yet....will be early Sept.
Before anybody comments, the line coming off the crankcase vent terminates at the carb, so any oil ejected from the vent will go into the engine, not all over the outside......seems to work. I have about an hour on each motor breaking them in on a Great Planes giant Ugly Stick. Before I added the Hyde mount, I thought the Ugly Stick was going to shake itself apart.....it didn't!
I'm thinking of using that vent tine to add some lube to the cam before each day's running, after a few runs with the engine inverted, the cam and lifters were pretty dry.

Cheers,
Dave.