Hey, that drawing looks familiar!
It seems as thought the ratio is roughly the same as it is on the M50's, 1/8" longer center to center equates to a 1/2" drop. This is a diagram for 1.5" drop. So, on stock bones, center to center, they would be 3/8" CLOSER together. So center to center, 4.375".
I love using useful threads. Unfortunetly, there was alot of non-sense on that thread from others as well. So I just used what was essential to the question. Oh, and great job by the way!:bigthumbsup:Hey, that drawing looks familiar!
By the way, the center to center on this drawing actually gives you closer to a two inch drop.