Has anyone converted an M1 drill rifle back to a functioning rifle? I have an acquaintance who has a drill rifle that has only a very small spot of weld joining the barrel to the receiver and he is thinking of cutting the weld with a Dremel tool, cleaning the weld residue off, and installing a new barrel. I have seen other drill rifles where this was done but I'm still wondering about the safety of it. Does anyone have any first hand knowledge of rifles that have been converted? Please keep in mind that it is a very small spot of weld and there is almost no discoloration beyond the weld indicating heat migration. I would appreciate any insights. Thanks.