Diamond on RAMPS (2 replies)

My printer has been rebuilt to RAMPS some time ago, after a burn-out of my Gen6.

My question is whether I can go to Diamond head on Ramps ? Or do I need to rebuild it again to other hardware ? Wich one ?
I think Ramps only support 2 extruders, not 3? Or can that be 'fixed'?

Can I start using the diamond with only 2 extruders in mean time ? Or does the filament drop out the 3rd not connected feeder ?

Thomas