If I were going to run a tournament I would use+/- 80% of 200. Nothing kills the multi entry tournament faster than scores that appear crazy high. If the guys over 200 can't do the math and see they still have an advantage with negative handicap then they can choose not to participate. There is absolutely no reason in a handicap tournament for people over the handicap base to have even more of an advantage. I would also set aside a portion of each entry for scratch prizes, but you would only be allowed to cash once, whichever position pays higher.