"I've been looking for a decent used tiller and see a LOT of 48". In theory I'd need wider than that to cover tracks on my 4310 though. Is there a way to offset a tiller somehow to get behind a tire? "
I have a John Deere 450 tiller (48") that I first bought when I had a 455 and kept when I upgraded to the 2210.
After buying my 4310 I thought I'd get by with it only covering one track until I could find a decent used 60". To my suprise, it works really well behind the 4310. It covers both tracks, barely, but it does! Sure I could handle a bigger tiller, but the 450 hasn't been the problem I thought it would be.
Kind of disappointing actually. A local dealer has a hardly used Land Pride reverse rotation 60" that I wouldn't mind having, It's just hard to justify seeing as the 450 does so well.
As for the 755, I'd stay with a 48". Better to have a smaller tiller that you have the power for than a bigger one that struggles. Being able to keep the tine speed up while digging deep will do a better job on the soil.