I'm gonna do the same on my MF
1010 SCUT. The way my lift works the deck, I MUST use a 3pt drawbar to keep the arms locked in place, so I use the drawbar to do it. The left lift arm has a contrapted deck lift system....a bracket bolts to the underside of arm, then a chain hooks into slot in it. The chain goes up through a pulley, then down to deck. Kind of a crappy afterthought system, and without the arm stabilized, it draws the arm out into the tire flexing it even with the limiting chain. Well...that got into a winded explanation! The reason I plan to add the 3rd arm to the drawbar is because the 1010 is handy for moving trailers & such for mowing, but without the 3rd arm, I have to get off & lock the trailer hitch. With the 3rd arm to lock it from turning, I can lower it, lift & move trailer without getting off. MUCH easier!