RE: Advice on Super Skybolt (engine mount and servos)
Actually it tends to come out very tail heavy - even with an OS 160 twin I needed to add 60 grams of lead to the engine mount. Before the 160 I ran an ASP 120 4 stroke on an OS 60-120 solid mount and ran 180 grams of nose weight.
You really don't need an isolation mount with the big 4 strokes, both of mine were solid mounted and never had a problem.