All lipped trays purchased after October 23, 2007 have the capacity to be angled using the angled support bracket. Use this Angled Sup... Full Description & Details.
I do not like the angle this product gives. If you put it on the back like it states it angles the trays to far down. I have tried it on the front where they tilt back and may use it that way. If not I will note use a bracket or purchase another kind of base.
Didn't like it, didn't work, didn't use it.
I kept thinking I was missing something when angling the trays. they end up after being stacked with the entire set tilting precarioulsy forward. There is no way to adjust the trays so that the top tray is not to far forward and the bottim tray ending up tucked back and hard to get to. It really makes no sense to even try without allowing some sort of adjustment on each tray to slide it back a bit for a flush front. (does that make sense?)