RE: Goldberg Ultimate 10-300 ARF .60
Cam,I have built a kit version and two ARF CG Ultimate Bipes and have had no problems with any of them. I even used a ST 2300 in the last one. (Kit built and lost in a crash. My fault) Just had to beef up the firewall. Flyers at Ft Rucker Alabama use the large Super Tiger engines in their Goldberg Ultimates. Unlimited performance. Sounds crazy but what the heck. You only live once. There is a bad kit in every production run and sounds like you got one. That or you are a real fussy builder.
Jay.