Lefty50,
I used a MOtion hole layout at Nationals last year (Brunswick Meanstreak Brawler; pin over ring finger CG in grip center, 7/8" diameter MOtion hole), and I had no problems at the scale room. As Jorge300 mentioned, have your pro shop weigh it just to be on the safe side.
I practiced on both the Team and Doubles/Singles pattern last weekend. This house has put out the shot for the last couple of years, and every year, it plays very close to what I've seen at Nationals. That being said, I had a very good look with my Meanstreak Brawler and a Yeti with a MOtion hole (pin over ring finger, 1" diameter MOtion hole, surface at 1000/3000 Abralon). I plan on practicing again, and if I'm able, I'll try and post a video of a couple of shots.