The notion that a cylinder cannot be altered to fit from factory spec is nonsense. It can be and is done by people who know how with complete safety.
Course it will make a factory trained mechanic apoplectic but that is just because they are generally only trained to do things the factory authorized way.
Here are a few ways a cylinder can be altered to fit a frame that it would not initially.
They can be shortened, base pin hole bushed and reamed to fit original base pin , a bushing fit to correct end shake, ratchets peaned and recut, ratchet bushing installed and recut , bolt notches widened and offset and a new over size bolt fit to correct out of alignment and the list goes on.
A barrel can be set back a thread or two and re-qualified to work with a short cylinder.
Hands can be stretched for more length, welded or shimmed for more width, triggers can be forged or made from scratch for a paddle profile preferred by target shooters.
Sear lifts can be in stalled to safely shorten sear/trigger engagement and a whole lot more possible to make a run of the mill factory gun that sort of shoots into a real race horse.