I use an Elomatic speed reducer (intended to INCREASE pto speed for pumps, compressors, generators, etc.) to operate my PTO genny off of my F935 2000 rpm mower drive pto. Yes, the genny runs backwards and there is redundant speed down and speed up in the system. It's good for 12kW which is plenty in my neck of the woods. I monitor Hz using a Kill-A-Watt. Governor does a good job maintaining rpm.