These are Gear Tracks we using in the Kayak world. YakAttack makes these and they are the best out there. If you are going to drill holes you can move thing around and never drill any more in the future. They have light duty made out of plastic and heavy from Aluminum. They are a bit pricey, but they work very good.http://www.yakattack.us/category_s/1831.htm
These also work and they are the mitering track wood workers use. They are cheaper than the Yakattack. You can buy and make your own anchors and mounting hardware. Ideas are limitless.http://www.woodcraft.com/category/3/1001050/1002307/Jig%20and%20Fixture%20Hardware.aspx
Here is how I make my own anchors for mounting stuff like Depth finders, rod holders, rope cleats, camera mounts and more.http://archeryrob.wordpress.com/2013/03/18/slide-trax-nuts/
How the fish finder and rod holders mount to the strips for ideas.http://archeryrob.wordpress.com/2014/02/15/no-drill-fish-finder-mount-for-slide-trax/http://archeryrob.wordpress.com/2014/02/15/slide-trax-scotty-rod-holder-base-mount/
And a dashboard for my one that is like a canoe. You can see how it mounts to these tracks.http://archeryrob.wordpress.com/2013/05/10/commander-120-dashboard/
The best part about using the tracks is you only drill holes for the tracks. If you decide that the mount in one spot was too close, you just loosen it and slide it forward an inch or two. Get tired of the mount remove it completely and make something else to mount on the track. It's complete changed everything and mounting in the kayak world. I will not buy another kayak without tracks and all brands are using them now.
They make a bunch of hardware you can buy and Austin Kayak carries alot of stuff made by harmony and other makers. http://www.austinkayak.com/search/SlideTrax
My Wilderness kayaks some with these and they work great of cross opening bungees and adding Bungee hooks. They cost a bit but they work well.http://www.austinkayak.com/products/9927/Harmony-SlideTrax-Molded-Fitting-2-pk.html
You can mount all kinds of Ram and Scotty mounts to this stuff. Good luck.