You can the use the one from the rolla for sure, did this myself also! I've also soldered bigger pins on the ground cable so that'd fit the rolla bracket. The rolla bolt for the bracket on the back is bigger so the pin wouldn't fit around it. Don't expect huge gains of it. I have the idea that the most difference I get is in the higher rpm range. Top speed increased with about 5 km/h. I was able to do 193 km/h on tacho, which would be around 180 real speed I guess