Hi,Dan, In practice you can fit metal tracks to any tank with plastic wheels BUT some types will suffer wheel failure sooner than others,
The Tiger 1 has most wear on the sprocket and rear idler the road wheels are not under much load from the tracks but conversely Tanks with rollers are an invitation to disaster,
In my worthless opinion metal tracks = metal drivetrain and plastic tracks are best suited to a plastic drivetrain.
I now wait an expert to arrive shooting me down!!! shaun