well, the fiberglass sleeve part I was told about was correct. I did not notice any of the Fx's having differing sized hollowtech tips; all had larger sized tips than before. if I understand what I am reading, there is just a "FX86", meaning its not intended to be like the prior iterations of hp or the wood non-hp. since this is a new layup, I think they are just calling it a FX86 (meaning there is just one layup/build). this makes sense.