I have purchased a Sundowner seat ( for the wife ) and drivers adjustable backrest for my Street Glide. I'm really disapointed in the design of the backrest, the metal upright edges are square and I feel will rub whole in seat quite rapidly, my brother is a machinist and is going to radius upright edges for me, so that issue is solved. The other issue is when reinstalling stock seat ( which I want to use when wife is not riding ) the adjusting mechanism protrudes up through the slot in stock seat ( is below on sundowner ) I know this will cut seat quickly also. Is my best bet to wrap mechanism with leather or modify seat in some way ( have leather sleeve sewn in, some sort of plastic sleeve installed ). Have any of you experienced this problem and have any suggestions.