Thanks everyone, looks like I'll need to go to a club to do a test. I've had good results using b-box, but it's another thing in the chain that can cause issues (technical or user error).
@Javier I did recently have some distortion using 943's w/o the 4.7k mod (but I'm not 100% sure it wasn't a b-box issue), so now I'm only running 4.7k mods (853s and 943) for loud shows. I remember asking about the mod for 943's awhile back and getting some lively debate. (one of these days I'll do another club test to see if my non-modded 943's distort, just out of curiosity).
So it sounds like I would use low sensitivity settings, PIP on for both the R09hr and the dr2d (@Porno Gil, have you tried line in on the dr2d, I use the dual record mode on my dr2d).