My suggestion, in the "OMG don't drill", "don't enlarge holes" side of things, is the new Ludwig Anchor spurs.
If you ever decided to sell the drum (or kit) the drum will have your stock spurs ready to go, and the drum will have no mods to it--just keep track of the 2 lugs
You can keep the posts to the spurs you have on the drum to keep it stock, but take out 2 lugs, and put the new Anchor spurs on.
These things are really substantial, without much of a footprint, and will adjust to whatever you want to do height-wise (flat, or up there). They have memory locks too!
These should be out pretty quick. The Atlas mount is now available, so these won't be far behind.
I saw them listed at $109, but heck, people are shelling out $80+ for a snare strainer and not thinking twice forcryinoutloud. There were pretty frickin' cool when I saw them at the Chicago show.