Hello Nick, This is what I did and as I recall worked pretty well. Once I skinned both fuselage sides I laid them on top of each other and put a heavy weight on the firewall end. Then I put a 1x4 about two feet toward the tail end under this stack. This caused the tail end to be off the table. I then weighted this end until it touched the table and let it sit like that for a week. Then did it again with a 2x4 and let it sit another week. This gave me a little "prebend". My fuselage is 44" wide at the widest point and I made it a little deeper as I am 6'-5" tall. It is a little time consuming but I think it helped instead of trying to pull it all together at once and possibly breaking something.
Stephen Teate Paradise, Texas