making track pads

[Jack3M]

Folks that machine are my targets here. My 4200xl with the Soyland upgrade motors breaks tracks frequently due to little rocks getting in. His system has fuses and they do blow when I get them in there, but sometimes, the track breaks first at the pin.

These are made from aluminum. I am thinking steel? (I am asking for advice, I am not a machinist but just bought a manual mill.)

My first attempt was with aluminum which literally wore out almost right away.

Methods? Make as one piece or 3 pieces that assemble?

Am I wrong to want to use steel due to the wear? That was 6061 in my first attempt that wore out so fast