Hmm forgot about align reaming. So the comp would still need to be fitted by a smith and cost would be a wash probably as if I just had a cone comp fitted anyway. And very true about drop in parts, that's why I put it in quotes hehehe. Sometimes people get lucky, but I'd be ok doing some minor fitting on the storm lake barrel if need be. But I would not be able to do the 1 deg angle on the comp seeing all I have is a drill press and zero experience with that.
I've found a couple local guys that I may can get an older STI from for a deal so if that pans out I'll leave the SS as be for now.
Thanks for helping an open newbie out. Learning a lot already!