Reply to TSP2 "Scratch" + "Pitchbend" mode on jogwheels? (Xone:4D)

I just got a Xone:4D and of course i found several mappings on the net. However they`re too overloaded for me since i would love to use the jogs in "Scratch" (i know they aren`t good for that) and "Pitchbend" mode only.
I understood that i most probably need to configure some modifier to switch between modes pressing a button but i couldn`t get it working.

Maybe someone can help me out here and tell me what i have to map

a) to activate the "Scratch Mode" for the jogs
b) to activate the "Pitchbend" Mode for the jogs
c) to switch between modes pressing a button

TIA!