I like it Brian; cuts down on the voting as well.

May i suggest that with respect to the time limit, we may play more long songs, but, may only play up to five minutes of them; as well as with the 1 (or 2)exceptions you mention. (note that an edit on the part of a contestant would still remain a risky proposition but one that may well prove to be a worthwhile gambit). I think that otherwise we risk arbitrarily eliminating works of great art for our mere convenience.