Originally Posted by TryHard

Seriously... just stop.
Max RPM means zero, nothing, nowt, zip, naff all....
By the max RPM you have used up all your boost and turbo, so it doesn't gain anything at all in terms of being able to setup the speedo, as you can't tell where it will have ended giving the boost.
Ask any data engineer, a single value for max rpm will be next to useless, hell, I could get a false reading easily by picking the car off the ground after a run and revving it up... "oo, look ma, 70,000rpm!"

If you want an RPM log, you need it in respect to time, so you can plot the rpm correctly on a graph vs time. Then you actually can get the meaningful data too (i.e. RPM at slowest corner!). As Angelo has previously explained countless times, there is no room on the ESC memory to do this. So to take something off the current software to add the feature that adds nothing to performance, no thank you.

If you want to log RPM, buy a separate data logger like Cherry has, and run it that way. Now stop your jibber jabber, please.