First up I have cleaned the tank internals and ensured that the gears have nothing stuck between the teeth. I do intend to remove the gearbox completely, but at the moment I an not clear on how to remove the main drive sprocket to help remove the gearbox. I think the end cap is glued on.
The chassis had no inner return rollers, so I drew up a return roller. However instead of it just rotating on the wheel, I designed it so that a 630 bearing would fit inside so that they would have less rolling resistance. They are then held on with a simple 3mm bolt.
I also made a replacement H15 inner mount as there was one missing.
I still an missing an outer return roller, the issue I have is the inner fitting, as these do not use 3mm screws to be held on like the inner ones.
