RE: Goldberg Ultimate 10-300 build
Yes, it is the Great Planes one that was part of the kit. My flying buddy who has the Ultimate kit with the 150 has the same mount. It is a great engine and sounds quite nice. I'm quite please with my Saito 120, fuel is PowerMaster 15/20 all syn. After your first few initial flights I suggest you check out all your bolts and screws. What I normally do is remove the cowl and check the engine and the mount for tightness. I use nylon washers with the cowl screws. On the engine mount I use one flat and one split washer to secure to the firewall. To secure the engine I use head bolts.
Charles.