Yes, using one with a brewhardware.com bottom drain. Have a Norcal stage 1 false bottom. Running RIMS with the setup. Had some issues with runoff (used rice hulls, crush at 0.028", so fairly aggressive, though conditioned / a lot of fluffy husk material), added a BIAB bag along with the false bottom, everything has been great since.
I batch sparge - get all those runnings on the burner and wait for boil to start, then once it is rolling and happy, I'll come in and pull off generally another 1/2 to 2/3 of a pitcher full of runoff. Then yank the bag, no having to move the keg this way (vs. before, taking it outside to empty grain and hose off).