I have a collection of Minolta X-Rokkor lenses that I would love to use again on my Canon XT. I have read on several individual's sites about using the M-42 adapter ring which will fit onto the XT's EF mount, and using a file to grind down .5mm of the spacer on the back of the Rokkor lens in order to focus to infinity, but I have not been able to find a Rokkor-Canon adapter in itself. Not to mention I am not particularly wanting to take a file to the spacers on the lenses. Do they make one? If so where might one be found?