Nice install. Very motivating. Will measure a bit better as I did not realize the back of the cupboard is smaller. Ideally I would like to get some of these installed next month.
I was thinking of using this product, as they are available assembled and ready to go, and I thought the solidly made slide base would be good with the light pantry shelves. A bit pricey, but looks like an easy install for those of us without the carpentry skills and tools. They are available in several widths and depths.
Standard Rollout Shelf
Standard Rollout Shelf 21.5" deep For 8 inch Cabinet Opening - Shelf Improvement 3hX21.5dX7.75w - Space Savers - Camping World
Here is another link that I think might be the product manufacturer? The product offerings on Camping World have changed a bit from when I was looking last fall. I thought the 'Slant Shelf' model would be a good choice for our Roo 233S pantry, but I don't see them offered now.
Rollout Shelves by Shelf Improvement for Kitchen and Home cabinets
This manufacturer shows a 'Slant Shelf' variant, although not sure the fastening method is as robust.
sliding shelves that slide pull out kitchen shelfs slideout shelf rolling slide pullout shelving for your kitchen storage and pantry cabinets