Great Price and good choice going with a custom on the front. When I bought mine, I had the factory one up front and it didn’t hold out water very well, so I bought one at a show for the front and had is installed. I just take me seat out and lift the rod. Mine doesn’t have a vent in the front. I don’t know if that is normal, but that is the way mine is on my 1800 Fisherman.
I never had to worry about breather ports on my cover.
I have 17 footer, full windshield, trolling motor and it also goes over the outboard.
I think mine cost about $480 from CC. Stand up people there and stand by their product. It also comes with bungee straps, they even gave us a couple extra. Fits like a glove 3 years later.
Depending on what type of seat/post you have, I found that 2-1/2″ pvc pipe, with a 3″ pvc “mushroom” end cap glued on, makes a great cover post/support. I remove the seat, leave the post in place, and slip the pvc support over it. HRG