I HAVE A 2000 342 BAJA. WHEN TRAILERING OVER 40 MPH, THE COCKPIT COVER WILL UNDO AND BLOW OFF THE BOAT. THE ORIGINAL CANVAS WAS REALLY WORN OUT , SO I JUST HAD IT REPLACED, BUT I AM HAVING THE SAME PROBLEM. ANYBODY ELSE HAVE THIS PROBLEM? IF SO WHERE IS THE COVER LETTING GO(FRONT/BACK/SIDES??)

I think you will find most of us do not tow with the cover on. I can but after a while the snaps get loose and I have to tighten them or the cover will start to come off. If you must tow with it on I would suggest using duct tape around the bottom to keep the wind from getting under it.
Just my .02 and what works for me!

I tow my 342 with a full cover only. I wouldn't put the stress on the snaps nor want to chance it coming undone and beating the gel coat.

Bruce...