Hey there Phil
I just noticed that both of your focusers have the fine focus control on the same side. I've turned around the shaft on the left one, for my machine, so that the fine control is on the outside for both
The only disadvantage is that because the shaft casings aren't symmetrical, you have to either lose the lock screw on the one you're modifying, or drill through the plastic casing to re-locate its entry point. You'll see what I mean if you try it.
I'm also considering removing the inner knobs entirely - they are somewhat superfluous and if you need to save weight they add up to be about the same weight as an EP.