Minolta Rokkor X 50mm f1.4 for M Mount?

Caught this conversion on the bay today.
claim of 2.5 feet to infinity. Isn't the flange distance rather longer for this lens?
Anyone use it?

http://cgi.ebay.com/Minolta-Rokkor-...552105208?pt=Film_Cameras&hash=item27b5b298f8
I have this lens in its original form on my XE7 and I LOVE it. If the seller really managed to RF couple it accurately to the M mount, this would would be a real nice rig to shoot with. I don't think it would be a good fit for my Barnack, but on a bigger body like a M5, it shouldn't be too awkward. I wonder how much it cost to convert this lens over.
 
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