We also have MOD 1.0 on our drive. We had to replace the gear on the motor though last month as it was getting worn after about 100ish fights. Mind you we dont grease them as its sticky, gets your hands dirty, and all the bits picked up from the wheels sticks to it and its hell to clean.

Our last gear on our arm is MOD 2.0 (EN-65) then a 2:1 chain drive. This gear has about 2,000Nm of torque on it during stall so this might be a little over the top for a 100Nm drive.