I ended up getting a Kuhn 58" tiller for my
B7800. 1900 delivered.
Yup could have got something cheaper over the net, delivered by truck. My thoughts were that I should probably get something from a local dealer so that I have access to good spares and parts supply for something that takes that kind of abuse in use.
I might be wrong and the sub 1K tillers out there from china etc on the net might have been very much good enough for my use, but I played it on the safe side.
What ever you decide, you need to be happy and satisfied with your choices.
Cheers