S850 rototiller parts questions.

hi all, just aquired a S850 rototiller for my B6000, its in good working order but the paintwork needs tidying a fair bit.
A couple of questions to those in the know, its missing the 2 arms that connect to the tiller to the upper rear lift arm on the tractor, does anyone know the lenght,diameter and hole sizes of these by anychance as i may try and fabricate a pair rather than search for a used set.
The second question, how important is the rear height adjustment setup, mine is missing the two wheels and support frame that goes from wheels to the adjustment bar, can i use the tiller without these parts.

any help would be great
rob

thanks for the reply, I'm very greatfull, i've sent you a PM also.

rob

Another thing that i noticed today is that mine does not have the rubber flaps on the rear, instead it has a proper cover which is height adjustable via the rear tiller adjustment bar, does make mine still a gray market flavour or an OE JBM part.
Says S850 on the decal.
anyone know the quantity of oil that should be in the gearboxes and what the levels should be.
thansk
rob