Tarhead:
Thank you...
I don't think I have ever used their slides... Thank you for bringing them to my attention.
The Side mounts are very competitive... the Undermount, a little high, to me.
Of course, the way I used my Side-mount slides UNDER the sliding shelves was not the norm...
Each sliding shelf I installed had a "Shelf" that I was mounting the Slides to...
The Real undermount has to be able to be installed even if there is NO SHELF there... LOL
I know the slides I used were not intended to be mounted horizontally... but I'm not putting a huge amount of weight on them either... They work like a charm.