To make the most from your forklift/orderpicker consider customizing to your application with a custom solution.
This picture illustrates a solution to separating orders with a hinge shelf, set up to pick with an order picker forklift, 2 orders can be fullfilled and dropped off for final packaging/processing at ground level.
You could set up a unit like this to handle panel or sheet material on edge, again with the addition of casters, drop off for final processing.
Here we can take a tray cart, add fork pockets, and handle WIP items more efficiently.
How about if we elevate the work surface and create a pallet sized work bench to work at the pick levels with an orderpicker?
The point is, call with your application and we'll work with you to come up with a customized solution to your picking needs.