Just starting to fit my cowl. I'm using the Van's technique to fit the cowl without the prop installed. I cut spacers to 2 1/8" since I'm using a CS prop. Backing plate and the spacers are bolted into place.
My cowl is a recent one, meaning I ordered and received it not too long ago. It's pink on the inside and grey on the outside. What's interesting is that if I have the upper cowl spaced 1/4" behind the backing plate, the top aft edge of the cowl is right at the edge of the firewall. Looks like I may only have to trim the lower corners.
While this may seem like good news, I want to make sure I have everything set up right. I thought I'd have some overlap on the aft edge that I'd have to trim off. It also makes it more difficult because I have very little space to temporarily cleco the cowl in place so I can start on the lower cowl.