Speaking from experience don't be afraid to experiment and always remember to measure twice and cut once. It's almost a guarantee that you're not get it right the first time. You'll rig your yak, take it out and realize that something isn't in the right place.
The crate in this picture was at one point a full sized crate, now it sits snug right behind my seat and carries most of my poles and all three of my fishing tackle trays.....all it took was a tape measure, a saw and some zip ties. Get creative and you'll safe yourself a sh*t load of money. Go through as many post as possible and look at the way the yaks are setup, you'll be amazed and what you'll come up with.
It won't let me attach the pic so here's the thread......
http://www.bigwatersedge.com/bwevb/s...ead.php?t=7407