Pegboard Spirit Level Shelf

I am adding some pegboards to my workshop area, and I'd like them to be good and level. To that end, I figured it'd be best to find an easy way to attach a spirit level to the board while I work to get it mounted to the wall. I designed a solution - and hopefully you can find use for it too.

This shelf has four pegs which should slot snugly into your pegboard. Simply attach it near the center of the board you are mounting, and pop your leveling tool on there. You an use shims to get it nice and level before using your preferred mounting system (I'd recommend this one ;) ) to attach it to the wall.

I'd love to see your uses/makes of these on your own pegboards. Comments & criticism always welcome.