Hi Rivetcounter,
I tried converting the DID "RC ready" Kettenkrad and it was/is a right bugger! In fact, it has been so painful, that I have hardly touched any models in the last 3 months!
First I tried HL gearboxes on spacers to drive the tracks.
These did the job, but the tracks kept coming off. I got bigger gauge spring steel to improve the tension on the tracks and this improved it.
I also shaped the track teeth so they slipped more easily into the drive/idler wheels. I then put the groundwheels (what's the real name for these??) together using brass tube so they were rigid and fixed in diameter.
Still the tracks came off after a few seconds.
Then I modified my HL gearboxes so they were no longer on stilts/spacers. Now the Krad ran well. But so well that the plastic gears were eaten away when you changed direction. I changed to metal gears. These too were eaten by the momentum the Krad built up.
I lost interest and this is now a 'dead' project on my bench...
Nige