My combi is only putting weight on the wheels when you lift it up.....Aye right. I left a small bit of the beet field unploughed and direct drilled it to see what would happen. It's under water, yet dry underneath. The rest of the field which we ploughed, power harrowed lightly at 15mph and drilled with the Unidrill is fine. Land after a root harvest is entirely a different matter to land after a cereal harvest. A lot more tackier wheelings.
I didn't use a power Harrow combi however. Went off the idea when realised the weight those things put on the tractor wheels. Better spreading the weight across the full width, as the Unidrill does, and power harrowing in front with a very light tractor and power Harrow with duals on just for levelling and consolidation really.
It's a fickle business alright.
Otherwise I run the weight on the packer and have a front press so not lugging a counter balance around....
After spuds I would ideally either subsoil or chisel plough. Tends to be harder after beet as wet tops stick to the tilth which goes a bit smeary on top. Tend to plough this.