I've got one pair of (reserve) wheels which has large recesses for the spokes (which are reversed) and, unfortunately, the edges of the recesses are quite crisp. Velox doesn't tear, but it does stretch down on to the hole and, in consequence, come away from the edge of the rim. On these wheels I use two layers of rim tape - Velox against the rim and plastic over the top of that. The plastic doesn't stretch, so the combination give me a flat surface that doesn't tear.