Yes, I have had the same problems. Did a Reaction 54 Jet a year ago and a Kwik Fli recently. Limited "tacking" ability, poor shrinking, hard to compound, pretty miserable experience. I was wondering if I had lost my touch... I used to be pretty good with the stuff ... till I had to use some old leftover material from 3-4 years ago to finish the Kwik Fli. That was what convinced me .. it is clearly a different material (or at least a different formulation) that had none of the problems of the newer stock. the KF materials were bought from Tower in the last few months, the R54 material about a year ago.

I brought the KF in for our club meeting and mentioned the problems and had several tell me they had the same experiences.

Oh, and as a nice "bonus" its the gift that keeps on giving .. it gets wrinkly on hot and cold days and requires reshrinking. Miserable...

I am done with Monokote. I had used some Ultracote in the past, found that it shrunk better, and especially compounds better, but did not think the seams stuck as well as MK.

Presumably this is the airplane dieties revenge for me cheaping out and using MK vs. a proper finish like fabric or glass cloth!

Dave