The engine is exactly identical to the original engine of the VK135. For me as an electrician (Technically somewhat gifted) presented the exchange of the engine is not a challenge. However, what the supplied cables should be not obvious to me, as they do not fit into the engine. When disassembling the cable from the original engine but you have very good care that you do not depart this. First you have the yellow rubber introductions deduct from the engine and then with a small screwdriver, remove the locking pins in the engine to the side, turn to loosen the plug. (I got out of sheer impatience same time demolished the first cable, but it was re-solder the plug without any problems. What is needed is the following tools for the conversion: Needlenose pliers, Torx Screwdriver / wrench 9-10cm, flat screwdriver small. Working for the conversion: Approximately half an hour In my opinion, the motor is not loud as the original and at least equally by the suction ago.
