I'm up to my elbows in proseal right now working on the tanks. As this is my second slow-build RV, I agree with others who have stated that the wings are the most time consuming and most tedious part of the airframe build. Once you've seen one rib, you've seen 'em all. If I could comfortably part with the cash for QB wings I'd do it in a heartbeat, but if you can't, I'd recommend just getting them done and out of the way as soon as possible. Then you can go on to the fuselage which is a lot more fun.