It occurred to me that for the first few passes, if I could find a spacer to put around a thick black sharpie, I could reach my hand under the cowl through the inlet holes and mark on the baffles the contour of the top of the cowl. So I found a 3/8" nut threaded nicely to the thick black sharpie:
I reached my hand under the top cowl and traced along the top of the cowl onto the baffles:
After I traced, I snipped the baffles and repeated. However, each time I went to stick my hand under the top cowl, it was closer to the engine and there was less room to work with. However, my skinny arms were able to squeeze into the space until the very end. Here is about 75% of the baffles trimmed:
All of this took about an hour or two. Dare I say it was *fun*? I don't know if you can use this method with the Van's cowl since the inlets are smaller. This is finally one of the tasks with the James cowl that saved me time over the Vans cowl!