I shoot skeet (yes I know -- bad thing to admit on this site) with an older standard weight 20 ga. 1100. The receiver has external damage so I'm wondering if I can convert an 1100 12 ga. that I also have into a 20 ga. using the parts from the standard weight 20 since they are both made on a 12 ga. frame. The 20 ga. barrel will slide into the receiver and the wood will swap OK but I'm wondering what else needs to be changed. I figure for sure the bolt and maybe the trigger assy -- anybody know what else? ........ or will this just flat out not work. Thanks.