So what are you after a slider, what type flat deck or round pipe is the kicker going to be part of it on the end or are you going to build a seperate kicker. There arent to many actual plans around because people just think up what they want and just start building making changes along the way untill you have what you want. You need to look at where you are going to use it will you have to float it or can it sit on the bottom, how you will transport it etc. For some ideas just flick through some mags, then start building just remember the more you put into it the the more it will weigh and it will add up quickly.
This is a vid of a slider that some local lads made in whyalla 3 pieces that bolt together with a ply top that has been fiberglassed. works well and can keep making more sections to make it longer. They mesured there trailer to get there section lengths. the fiberglass with a bit of water on it is super slippery and doesnt kill your board much.