If you have the ability to make some settings adjustments in your transmitter you can dial in the speed and control of your RC mower. Look for "EXPO" settings for your model (mower). By reducing the value set for each channel (probably ch 3 and 4) which you mix to have one stick steering you can dumb down the reaction time around the center stick position which makes it simple to drive at slow speeds and steer with accuracy while still having full speed at the far end of the stick travel. This makes a world of difference. No more touch the stick and it takes off full blast. Id recommend dropping them to around 50 or 60 and test drive and tweak as needed.

I built an rc mower too. Kinda tough to keep in a straight line. Try hooking up a gyro. It seems to help.

Nice job. Iwant to do the same with my snowblower and mower as well. Do you have any info on parts needed or ideas? Thanks again and great job