Tired fussing with the tiny rubber band pegs on the stock GWS mount? Wishing you had more or less dihedral? Want to raise the wing up and make a true high wing out of it? Maybe you need to raise the wing and make room for your camera? How about a Low Wing Slow Stick? You've found the parts! Generally, as you add dihedral and/or raise the wing up you get more yaw induced roll. This is to say your rudder will be more effective. The stock dihedral is 12 degrees. Maybe you're looking for a flatter wing layout to help make ailerons more effective? Also, if you have ailerons, you wish for the yaw to be more pure yaw and less roll. All these parts are here to aid in your experiments.
Incidentally, you'll have to bend your wing tubes for these higher dihedrals. This isn't too difficult if you have reasonable hand strength, insert carbon rods to aid and pull around a corner like the side corner of a pine 2x4.
Select Wing Mount Riser Lift first: -1 is the low wing set moving wing below the stick; 0 is near or like stock; actually my 0 starts just a fraction higher than factory mount; 1"; 2"; and 3" (refers to "inches" higher than the my 0 mount).
Next, select the Perch Dihedral...Note, 24 degrees recommended for low wing risers: 0 degrees (flat); 5 (less than stock); 12 (stock); 16; 20; 24; or 55 for a whacked out 3 channel rolling monster.
Photo shown is 1" Risers and 16 degree Perch set.