I wouldn't even bother with the Robinson stol on a 185. Heavy both in a/c empty weight and on the controls. Loose aileron effectiveness at slow speeds.
Best cuff by far the sportsman. Some cheap micro dynamics VGs (especially on vertical & horizontal stab) improve low speed handling & help keep tail up on low speed approach with aft c of g.
Wing extensions definitely the A.R.T wing-x stol though they reduce your VNE to about 165ish but can fit nicely with a sportsman leading edge (can be builti into the extensions) and can be removed pretty easily.
Another is the flint tip tanks extension. Don't reduce VNE but can't have a sportsman style leading edge so there's a fence in between.
Ultimate beast- sportsman leading edge, wing-x extensions and micro VGs. Machine
