In reply to Stefan Jacobsen:
I find italian hitches really twist the rope abseiling.
Apparently worst when the out rope is in line with in rope, ie straight. Better if rope is doubling back, like if lowering.
Allegedly double munter doesnt twist, never tied one in anger.
Using two , did you try one tied left hand the other tied right hand?
Just got a new 7.9 and 5mm combo to try out for abseiling.