My homemade slide:
I originally used Home Depot slides on mine, but after a couple years the ball bearings started to fall out, so with Home Depot no longer selling the 24" full-extension version I had, I went with Knape & Vogt #8400 slides. The KV slides, though made in china like the HD slides, seem significantly sturdier than the HD slides, so hopefully they'll last a bit longer (they do take quite a beating on washboard roads).
(yes the bungees are turnbuckles now)