Have you actually got CrossCutters on an older Carrier with no problems then, have been told they won’t go on any model pre2020You can put cross cutters on no problem. We have a bio drill on ours drill osr very successfully and cover crops.
Cheers, that is handy to knowMy carrier 420 is more than 10 years old. I put crosscutter discs on it 2 years ago … wish I hadn’t bothered. Can’t go fast enough without it bouncing.