Send Clowns, a tip for you: get it in the hover, switch the governor off and SLOWLY roll the throttle off and bring the RRPM down to say 95% - listen to the engine note. Then roll it slowly on up to say 108% - listen again. Aside from a fair old change in Lift, you can learn what sounds right. Remember plenty of piston helos don't have governors and governors can fail eh?
Our school used to teach quite a simple yet effective technique. After all the pre takeoff checks are done and you are starting to raise the collective, about the time you can feel the airframe start to get light on the skids, pause and check your power AND RPM. Mainly to check the governor is working. Once you have lifted to the hover check it again. It only takes a trained glance and it teaches an awareness of power and RPM that is invaluable.
In my mind, you can't lift one off the ground and go taxying or flying without knowing beyond any doubt your power and RPM and everything else are OK. I used to say to students when doing governor off training: if they are scanning the RRPM guage a whole lot more with the governor off than they normally do, then maybe they are not looking at it enough with it on and putting a wee bit of blind faith in the hands of a circuit board.
It is a fantastic device, but not if its at the expense of basic RRPM awareness and management. RRPM is your life in any helicopter, don't just leave it to the governor.