I don't have much problem with Monokote. I think it does take more heat, and maybe a stronger pull, but it stretched quite nice for me and everything pulled up tight with the gun. Being use to Monokote, the Ultracote I tried gave me fits until I turned down the heat. Was still more of a struggle for me, but in the end it They all did their job quite nicely. No peeling or real sagging issues from either.
Now tell me what was what on these models and I'll give you a cookie.