The 9N & 2N only had DRAFT CONTROL and if hydraulics are worn will have issues with holding implement up. The Zane Thang or Red Rock unit adds POSITION CONTROL to those models; the 8N and later had Position Control built in. Limiter Chains will help on any system if hyd is worn and won't hold. STABILIZER BARS are advised to use with any mower or back blade. Don't confuse with STAY BARS -two different animals and uses for each. Jim shows limier chains and STABILIZER BARS in his photo below. STABILIZER BARS, or Anti-Sway Bars, require adding special brackets underneath the fender bosses. New kits use angle iron brackets. You need to know how they are set correctly and then once set LEAVE THEM alone. They will be set for any implement that uses them and no need to invest in an 'adjustable' bar. Jim's setup also shows he added check chains to keep his STAB BARS with the lift arms when not in use. Otherwise there is no hassle when attaching an implement and stab bars. You might want to consider adding an ORC as well. It will save you from driving into fences, trees, ditches, lakes, or fence posts.