i had it done on my crank , it was in the lathe for about 10 hours , the guy charged me something like 250 bucks for it . it did look alot nicer than hitting it with a hand grinder , but if you are planning of doing any profiling , like knifedging i would do that FIRST before removing weight , the 4340 eagle crank used in the EM470 was profiled and needed 2 slugs of mallory to balance at 2191