An artillery barrel the way the Germans and Eugene do/did theirs is tough.
The lathe part is easy; it is the front and rear sight bases that are tough- and done on a mill; as Rich well knows.
But no, I don't think I "need" a .45 artillery or carbine; I'm happy to have one of Eugene's .45 lugers, and would "up-grade" it to Navy status if he ever builds a .45 size rear toggle with Navy style sight.
I do enjoy/prefer the original lugers with historic connection and especially unit markings; but these 21st Century .45 luger style pistols from Eugene are already historic in a way- as the first even "semi" mass produced .45 cal lugers made. JMHO.