I feel your pain- similiar issues- and I have the same 2 skis, same line lengths at 36. This morning I resisted the urged to go down the rope, focused on edge changes and looking down course, and it helped significantly.   For me, I suspect it's a confidence issue after a hard OTF, then I missed a couple of missed easy passes and bam - nasty slump. For me it is overthinking, rushing, and pulling too long in on-side turns, not equipment...  You'll get it back- run a bunch of back to backs on a length you're comfortable with (-28), each should get easier/ ie- less effort.Â