RE: have the abs but now with the wheels..
I us file and file off a VERY small amount of the inside lip of the ABS so it doesn't snag when going in. After that I just tap them on with a rubber mallet.
When I say a very small amount I mean a VERY small little angle to the inside of one edge. If you file any more than that they will come off easily as the wheel contacts the ABS at about that point.