The trays are store bought from Bass equipment, I built my own cages. Bass is close enough for me to pick up the trays and wire as the freight on that stuff is high. I used adjustable shelf tracks mounted on rails at the top and bottom so they can be slid sideways and then welded EMT conduit to their shelf brackets so my cages just slide on them and hang and my pans set on top of another set if there isn't a cage underneath to set it on.Wow! P.O. I'm so jealous! That is an awesome setup! What do you use for trays?