I've welded up that worn groove, in that hole before and ran it. It worked, but I only did it about 2 years, then I upgraded that whole rear assembly to an MaxEmergePlus style, so I could put on some different aftermarket closing wheels.(when from, thin steel to thicker cast closing wheel arm brackets)

Note: That rear bracket (arm stop) is replaceable = has two bolts going upward, vertically, from the bottom; but make sure you get the correct style, for your planter, and/or may sure you decide if you want to upgrade, before buying any parts, also.

Edit: Upgrade takes different bushings, also.

http://www.shoupparts.com/SH63118/

http://www.shoupparts.com/SH65889/

http://www.shoupparts.com/SH79141/

(sh63118sm.jpg)

(sh65889sm.jpg)

(sh79141.jpg)

(SH65888.jpg)

sh63118sm.jpg (65KB - 81 downloads)

sh65889sm.jpg (53KB - 72 downloads)

sh79141.jpg (6KB - 79 downloads)

SH65888.jpg (12KB - 73 downloads)