Golem,
twin spark is always better for the combustion. The engine will not get so hot anymore and the burning gas will be optimal.
Millepercento, (Bruno Scola) use to do the flow job. Flow job=rectifying of the two heads of tyour V11. The max will be 0.5 mm they will get off.
This means more compression and better combustion. Remapping of the ECU is a part of it.
I don’t know the exactly price of this work but it would be around € 400,- Sound reasonable to me…
Try to get a camshaft of Scola to. The OSS 8.2 will be the best for the V11. More torque