Embudo skirt pop, fixing the problem
I have paddled the Embudo for the past 3 seasons with a Wildwasser Hipster. Yes, I agree, the skirt pops off regularly, even with an Implosion Bar! Here is what I did to fix the problem:
Sand the cockpit rim where it dips down in the center. Apply some moldable PC7 epoxy to the underside of the cockpit rim. Your goal is to re-shape the rim to minimize the pronounced dip in the center, when looking from the side, and give the lower lip of the rim more of a square edge, not rounded, when looking at a section view. This will eliminate the feature that causes the skirt to pop, and give a better edge to grip the skirt.
Hope this helps.