Finish it up with the IBS. I cut the factory center hard tank vent line just as it comes out of the floor in the starboard bow storage area. It's tight in there and the Mojo storage compartments are deep. So, another word of caution, have somebody around to pull you're fat arse outta there. I was on my back installing the check valve & vent line and popped right into that hole. I had to wiggle and squiggle to get turned back around to get out of there. You may also want to start with the bow so you're not too many beers into the job.

I pre-measured all my lines and installed the IBS fill and the vent lines to the valve before attaching the valve to the center vent line. From the left is the vent line if you're only using the center tank and no IBS, from the middle is the fill to the IBS and from the right is the incoming center tank vent/fill line.



everything hooked up.



The vent off the top of the IBS is tricky. Since the center hard tank vent is a 1 in line, you need to order a 1 inch Y connector (it's listed as 1 1/8 in on Wakemakers) and a 1 in check valve. I missed that it was 1 in the first time and ordered all 3/4 in parts. Sorry for the bad pic below, but you can see the larger check valve leading to the thru hull vent. That is the only connection I put a hose clamp on. I thought "just in case" it would be easier to get to remove that versus a crimped connection.



pic of the IBS installed, but not filled. It had been filled as you can see from the missing cupholders. I ordered the bow cushion which means these are normally covered anyway, so no worries.