I thought that I posted these questions in the GATE forum but my post doesn't seem to be there (maybe it's delayed?). In any event, I did run searches on these questions because I am sure they've been answered but my searches were not successful. First, how does the size of the G21SF grip compare to the G21 4th gen with the smallest insert? I haven't been able to get my hands on a 4th gen G21 so I haven't been able to compare them in person. Second, do the "-" connectors that work with the first through third gen Glocks also work with the fourth gen or do fourth gen sue a different connector? Thanks.