I shot some video of the Leopard 2 with the new gear box that has bearings on every shaft and some hi torque motors. This tank has metal wheels, suspension and tracks, Weighs in 12+ pounds.
Just an RX 18 powering this, and the video proves the much maligned RX18 can handle a lot.
Of course a DBC3 and Benedini TBS.
The elevation on the barrel is controlled by a slow speed servo tied into a proportional channel 5 on my radio giving me fully independent control of the elevation.
This tank has just graduated out of the garage and is on trails to do a shakeout on the mechanicals prior to a full Canadianazation treatment.