What type of carpet are people using with the CRS floor tunnel. I got an auto tunnel set and the fit is shithouse, seems way to big across the tunnel.
fred
A thick underlay helps, my carpet is a little baggy but not too bad.
Some heat and weights will help shape it, careful with the heat though as you can easily singe the carpet. One idea I want to try but haven't is an electric blanket on the floor then carpet over top, then weight bags to shape the carpet.
Aside from all of that, you can only go multi-piece custom carpet :-\
Try a steamer on the carpet.