I was on a 66.5" Denali V 3.4 when I dropped to 32 mph it worked well at this speed and I ran into 35 off on it a few times in practice, unfortunately it broke.
I went back onto my 66.75" Mapple 6.0 which I haven't run 32 off on despite having @SkiJay set it up for me, I am now on a 68.5" 6.0 and my scores are the same, took the wing off for one set last week and that felt promising so will see how it goes this weekend.
This is my 5th year at 32 mph and it all feels downhill as I am getting older and less fit and wonder if it is worth getting a new ski, will be interesting to see what other people are on.