NineSeveN, Black Majik ...
I say if you love SIGs, then dremel off the tab portion of the slide stop leaving just a mm or so protruding: enough to catch the slide but not enough to gouge your thumb or enough to inadvertently depress. From what I gather, SIG slide stops aren't intended to be used as slide releases anyway, so the only intended purpose of the tab portion would be for manual locking of the slide. The remaining mm would probably still be just enough to serve this purpose. If not, then the insertion of an empty mag certainly would.
My 220s--a DA/SA and an SAO--are still new enough to me that I haven't yet determined if the slide stop position will be an issue, but if so, I won't hestitate to cut off the tabs.
After about 10 years of shooting pistol and longing for 220s for the past five years but passing on them due to the slide stop position issue as well as the lack of beavertails (the X5s are "more" gun than I am looking for), I've just reached the point where I'm willing to cut off the dang slide stop tabs and round out the portion of the tang that gouges my thumb's second joint and to just bask in SIG nirvana ...