I'm a convert to hanging the Ernst rack vertically (the partition/bulkhead in my van), Have tried shadowfoam and draw organisation in the past.
I like my most used tools easy to grab quickly and on display in a specific place without the extra barrier of having to open a drawer or door to get at them.
Add it up over a year and you will spend hours opening and closing just to grab a 10mm wrench!!!
Spanners that get infrequent use live in a tool roll in a drawer (still organised and easy to grab but use up way less space)