Hi AVB and Max,
Yes it is very springy at the back and unlike a tractor this has suspension so even the axle/diff is rubber mounted. We can only try it and as a last resort I will have to fit a castor wheel out the back. I have moved the deck as far as I can go and we do have another idea to move it further across if we have to but that will involve quite a bit of cutting and shutting work but it is still an option. Another option we have thought about is mounting a wheeled whipper snipper I have here to it so he can drive along the fences and trim them.