I glad it helped. I've never worked in a dive shop, but I once managed a very small bullet casting factory that was housed in a 20'x40' (6mx12m) shop. We were able to essentially double production and make everyone more comfortable just by thinking through the workflow, tweaking a couple of processes, clearing some space by getting rid of a bunch of stuff that was no longer usable, and moving what was left to where it made the most sense. We didn't need to buy anything except some framing lumber and plywood to build a workbench in just the size I wanted. It was the most satisfying thing I did there.
You don't have to go full McDonald's tennis court on your process, but it really does help to think through what you actually need to do in your shop space and put stuff so there's a logical progression.