Wes ... ribs are prepuched to correct size in ribs and skins ... I just started my build yesterday. Very minimal deburing of holes necessary. So far, a newbie builder like myself (with a bit of help from guys like you on VAF and builders in the "neighborhood") should be able to handle it. A "repeat offender" finished his wing kit in 105 hours ... wings, flaperons, skins, everything in two weeks. I'm glad it's not a race.
I'm going to try to flute via the rib lying flat on table with flanges up so I can see what each flute adjustment does ...