Is you experiment same problem than me when your pack is about half dump
With good quality cell like Flightpower, normaly we're suppose to be able to dump all the pack without kick the LVC.

If i leave it on reduce rpm like you did on your's, i'll only take about 3700mAh on my 5000mAh pack, and it's a good quality pack that i've.

Anyways, i want to try a 5s on my truggy, and drope 2T on the pinion to keep about the same speed, maybe i'll pull little less current and i'll be able to have full power thrue my entire pack on reduce RPM mode

I realy don't like it, i spend lot of money to obtain a good motor (Neu 1515), good quality li-po and high-end controller (suppose to be high-end) and i'am not able to have good performance during all the capacity of my batterie pack when i use the controller li-po protection.

I realy consider to return nitro, you fill the tank and the performance stay at 100% all long they've fuel in tank.