I haven't done one either myself nor had one done. But from everything I know about it, I see no reason why it couldn't be done. A call to any of these custom pistol smiths would give you their answer.
Jack Huntington
JRH Advanced Gunsmithing
775-355-6898
385 Freeport Blvd, Suite 13
Sparks, NV 89431
mailto:[email protected]
www.jrhgunmaker.com/
Good info fellas. Was concerned about the amount of steel left above the locking bolt screw. As the frame window needs to be opened for the larger cylinder.