RE: Goldberg Ultimate 10-300 ARF .60
I built the kit in 1991, kept the plane for 10 years & 1100 flights. It weighed 9.5 lbs dry and had an OS 1.08 ( good choice ). Other than wishing for more power once in a while, it was PROBABLY the best flying, best landing plane I have had in my 20 year stint. If the ARF is anything like my kit, you'll love it.
I have built / assembled about 50 planes over the years and just about 100% of them needed some tweaking to get the stab in alingment. I would have gone to whatever lengths were necessary to get it right, makes a big difference, especially in this kind of plane. You cut, fill, recover, whatever it takes, it's worth the effort......... Good luck.