You'll get there, just keep on going! Just don't let your enthusiasm drop after you've been cutting and gluing tiny pieces of paper for 4 hours straight like I have.
And now, another update! Left forearm piece is 90% pepped, and I think I might just stick some foamcore or cardboard inserts in there instead of trying to put those little flaps in like the pep file has. It seemed a bit wide, and was way too loose on my bare arm, but once I put on the jacket I'm planning to wear, it seemed just about right. I might see if I can trim down the diameter slightly anyway, just so I can have a slightly more fitted, sleeker suit. Whew! Time for a break.