Internal Height Gauge
Dan Erlewine at FRETS.COM
From toilet paper holder to Internal Height Gauge
OK, this is another "why didn't I think of it" thing. Its simply a toilet paper holder rod. You know, that thing that springs right out of your hand just as you almost get the paper roll in place. Dan simply glued on a slug of maple and threaded it for a set screw:
See? Just a maple block with a thumbscrew:
Sticking the device way down inside, Dan tightens the screw to gauge the height needed for a brace prop:
Simple enough, now all he has do do is cut the prop to length:
By the way, here are a couple of his brace props:
Notice the upper one. Dan likes to add a bit of sandpaper to the end to keep the prop from slipping when he applies clamping pressure.