Hope you don't mind me chiming in on this one.
While not groundbreaking by any means, we took a look at all the edge checkers out there and took all the things we liked and improved them. This is the edge checker I would design if you let me go crazy (although Russ (the real engineer) gets most of the credit, I'll take a sliver). The main goal was to create a one-handed version, one that was very accurate AND quick/easy to install measure and move on. Here's what we have...
-Wear plate on tippy bar: no more bad readings when the paint gets chipped or the metal wears down.
-Tippy bar Storage: We've embedded a magnet in the base, and carved out a spot for the bar to sit in (and stay, thanks to the magnet).
-Short Throat: We wanted our main two center lines to always be true center, we didn't like how some edge checkers function differently when used on short/worn down steel. Now, brand new steel and worn down steel will always use the true center line as, well, the true center line.
-Spring Loaded Clip: Helps to keep this a one-handed tool
-Recessed Edges: We found that when the tippy bar is the exact length of the base, sometimes it can be hard to read, so now the bars ends run off the edge of the tick marks making it easier to read.
-Protection Wings: when the bar is being stored, we have two wings on each side that help guide it into place and keep it safe if/when it's dropped.
I've attached a few pics of an "almost" final version. The real deal should be available sometime in August on our site.