Yep your right on the money for sure with the prop.
Damn that speed pretty good for the rpm, hmmmmm what to do,,,,,,,,,,
The MGL instruments all do that jump, UNLESS you go inside the main settings and change the filter and the bla bla bla, but then because you are getting such a quick response it changes about 40 times a second in 2 rpm lots, very hard on the eyes , i done it once and damn near couldnt remember how to change it all back.
Yep those guages are about the best for the price i have found, i used the E1 on the last machine i built, the whole engine monitored on 1 guage in very easy to read and set up system, for i think $450, you cant go wrong with that i feel.