i got my slide from liftco in elkart it came with the opening frame and floor with motor for opening and closing. it basicly glides in and out with support arms in and out it doesn't touch the floor at all it was around 7' with 27" travel and cost around a 1000 bucks when i toured showhauler it was the brand they were using if you want any type of resale value don't build a truck with out a slideout
http://www.liftco.net/