Likely won't be a "consensus." Just varying opinions.
Mine is, that since S&W Model 645/4506 family magazines are still easily available, the idea of making them out of 1911 magazines is mildly interesting but kind of pointless unless you are stuck with none of one and a pile of the other.
The magazine is the heart of a semiauto firearm. The reliability of the gun depends on the magazine working properly, which depends on the magazine being in spec FOR THAT FIREARM.
There are literally millions of junk 1911 magazines floating around. Many shooters have had poor experiences with 1911 pistols, finding their particular example to be unreliable. Much of the time, it is because they have a poor magazine. Altering one to make it sort of work in a 4506 just gives you a junk converted magazine.
It was interesting to see that the fellow didn't take the pistol and converted magazine to the range and shoot some ammunition through it. Hand-cycling one dummy cartridge through it doesn't prove much, except that one can hand-cycle one dummy cartridge through it.
Incidentally, the S&W magazine shown in the clip was designed and manufactured for the earlier Model 645; you can tell from the sheet metal floorplate. The later Model 4506 magazines were a genuinely improved product.
Stay tuned for my video of modifying a 2005 4 cylinder Toyota Corolla engine so that it will fit into a 2005 4 cylinder Nissan Sentra.
