What is the thought on the shorter a-arm for the R1200S? I know you can buy the RT a-arm which is kind of pricey. What exactly is different with the RT item that makes it shorter? I was looking at the a-arm on my bike, and where the casting is machined for the lower clamp "Jesus" nut, it looks as if there is room for a range of spacing. It seems as if a reasonably talented machinist (Motoyoyo?) ought to be able to machine that hole out to an oval and use stainless steel spacers for fill the gap and give a bit of adjustability. That should be a lot cheaper than the $700+ the new a-arm would cost. Any thoughts?