As much as I would never carry without a round in the chamber, I would do so before paying $140 to have someone modify a perfectly functional handgun and risk introducing a point of failure just because I'm afraid the gun will "go off" for no reason.
Carrying with an empty chamber is free, doesn't risk fucking up the gun, and can be dealt with by "training" I suppose.

I wouldn't do either of the above options, but I certainly wouldn't dick around adding aftermarket/homemade gunsmithing features to a carry gun.