Thankyou for your comments. Mike they are supported by gussets underneath and I'll take a photo today so you can see the fabrication of it. As mine are not cast, I am more than confident they are more than strong enough to support the rollers.
David, ( 'Wombird' and 'Bower Bat' )
now that would be funny. I have already got a Perkins engine that is of similar size and was considering using that. I thought that full hydraulic would be very user friendly as I have no drive train at all. If I used a pair of hydraulic motors to each hub it would operate like a skid steer and very easy to drive. I would connect the valves to the original tillers so it would look totally original. I guess when that time comes, I will see what my options are. In the mean time I still have to make two 1400dia full ballrace bearings and a couple of turrets, seats, 3 reduction hubs and a few panels. Oh, and two traversing gearboxes of which I have drawings of. All are a challenge but exiting ones at that.
Colin.