Gehl balers without the floor belt are pretty good. IIRC that means 60 series and later machines. Parts availability is of concern as the line is simply discontinued, and further, Manitou has bought a majority interest in the rest of Gehl so there is little Gehl family pride driving parts availability into the future. Manual electric and manual hydraulic tie makes no difference so long as you have a remote valve available to control the hydraulic version and 12V to power the electrical style. Your fingers and brain control twine placement either way. Automatic tie systems are more consistent and require less efffort. Your TN has a 4 prong accessory plug at the back that will handle a 40 amp load; should be sufficient for amost any electric tie system. 81864735 is the New Holland part number for the mating plug.