My yacht also has the trailed steering wheel, static 'push' test seems to look more than adequate.
Next problem is a sail control, obviously a sail winch owuld be great, but when pennies are tight thats not an option, they seem to come in around £20-30.
Next likely would be a motor driving a loop, with limit switches, but that then means a battery pack and more weight.
Mine was nothing more than a stick and a plastic moulding, I've cut a board to fit the shape of the moulding, that should give it a little more strength at the expense of access to the internals. I also cut a bioad to support the front axle, this also looks miles better, much better than the former 'racing sausage' look.
I had a look for the italian website, but it seems to have gone offline, pity as there were build article, videos and animation of how things worked.