Setting up my Diablo and have a few questions.

The manual calls for 7mm "elevator mix" @ full flaps. I am assuming that means down-elevator, but can anyone confirm?

The elevator rates and expo for normal flying + T/O and landings seem excessive in the manual (55mm and 65% expo). Would around 25 mm and 25-30% expo feel more linear and natural?
I see someone mentions tip stalls on landings and recover from 3D maneouvers. Would a bit spoiler mix (ail up) with flaps and elevator to spoiler mix help on that?