I am in need of a rebuild on my NV3550. The synchros are definitely worn out after 160k of abuse. Has anyone ever done the rebuild themselves? If so, did you buy a rebuild kit? What brand parts do you reccommend? I have seen a few options including crown automotive, allstate gear, and a few on ebay that I assume are no-name. Before anyone says it, I do not want to "just buy a new ax-15" which I have seen a lot of on other forum threads. I'd rather refresh the good trans that I have without breaking the bank.