Sounds like a twist that could have only been avoided by PF juice. However, I complete SB here as well w/ MP 100% in full ring, 25-75% SH. Nonetheless, Once BB check min 4-bet, it becomes a tight spot, as (generally) monster draw, 2 pair, and underset will tend to 4-bet shove here, rather that +20. BUT, in 100NL, I'm not seeing top set hit the muck here too often. Just a cooler.