That's where I bought my ply roof panels and I had to do a send load of cutting and sanding .I wrote him a long email and included pics of the finished job and also all the pieces I had to cut off ,He partially refunded me ,but I would of preferred not to of had to spend hours n hours cutting and sanding so called pre cut panels .
I'm going to probably make my own ply top half panels but won't do it until I buy the lower trimmed panel kit as I want to be sure how far the lower panels come up the sides so I can cut the ply to a correct height.