A comment for TimmyMac; you do not need to convert or modify Minolta SR/MC/MD lenses to use them on a digital camera. One of the most cost effective and simple ways to put a Minolta manual focus lens onto a digital camera without any other additional glass for an "optical correction" is with the replacement lens mounting flange for a Canon EOS APS-C body digital camera. The one by Mauro Placido at digitalrokkor.altervista.org is easily done. It does not require that you alter the lens. And, if you decide to go back to using the Canon EF and EF-S lenses on the Canon body, you just remove the screws for the Minolta lens flange, and put the Canon lens flange back on and put the screws back in.
Why permanently alter something when it is not necessary? That will also affect the possible sale value of that Minolta ROKKOR lens in the future, and I do not know what it will do if you try to use that modified lens on a Minolta camera body.