Good people of STW lend me your garage storage ideas.

Is there a better way? Current set up is X-tool / On One / Amazon chinese special front wheel hooks.
Garage is an internal one rather than a separate building so the walls are unpainted plasterboard. Hooks have been screwed into the studs. This has pretty much dictated the layout as the hooks need to be 600mm apart to hit the studs. I've staggered the heights of the hooks so bars don't clash.
It's works okay and is robust enough but I can't help thinking there is a better more space efficient way of doing it. Looking to do it as part of an overall update of all the storage in the garage.
Should have said its six bikes and the current set up is really N-1 as the turbo trainer bike sits on the turbo on the floor