Is the only difference between the 3035 and the 3545 the barrell on them? It looks like you can buy a heavy duty barrel for a 3035, would adding that make it the equilalent of a 3545?

Reason I am asking is I have a 3545 but would like to do .23 wire, if I bought the barrell that the 3035 comes with and the proper rollers and tips could I run .23 wire in a 3545? From what I can see the guns look the same with the exception of the barrells.

oops wrong section I think, can someone move this to the right place.