Hate to say it guys, but pretty bad advice. If you already are having to limit the deraileur limits to account for the spacer, why not just limit it properly so you don't shift into the spokes. Or if you want to keep it that much further, just limit out your lowest gear- a gear your much less likely to use on a DH bike than the 11 tooth. Adjust it properly or take it to a shop who can. That being said, thanks for providing everyone in the shop today a good laugh.