Rollouts are evenly spaced, with one located at the bottom and equal spacing between each additional rollout. We cannot modify the vertical placement of the rollouts during production, but you can adjust their positions on site by drilling new holes for the spacer blocks and drawer slides.

Correct, we offer a bottom-mounted pullout, but that doesn’t appear to be what you’re looking for:
https://www.barkerdoor.com/product-p/rolloutblumotionv2.htm

Please note that we also sell all the components needed to create a side-mounted pullout that is exactly the same as the ones you have on a past Barker Modern install. However, this setup requires more detailed measurements, as each component must be ordered separately rather than as a complete unit. All components are listed at the following link:

https://www.barkerdoor.com/Blum-Tandem-Plus-Blumotion-Drawer-Guides-s/118.htm

You’ll need a pair of 1″ white spacer blocks for each hinged side of the cabinet opening. So, if your cabinet has a pair of doors, you’ll need two pairs of white spacer blocks to ensure the pullout clears the hinges and doesn’t rub.
https://www.barkerdoor.com/Blum-1-slide-spacer-for-rollouts-p/t59.3570-blum.htm

You’ll also need one pair of slides for each pullout:
https://www.barkerdoor.com/21-Blum-Tandem-Plus-Blumotion-Drawer-Guides-p/563h5330b.htm

And finally, you’ll need a fully assembled, finished, and notched drawer box, as shown here:
https://www.barkerdoor.com/Baltic-Plywood-Dovetail-Drawer-Boxes-p/drawerbox-baltic-dovetail.htm