Hotbed clamp and height adjustment

If I had to single out the one factor that as influenced my (dreaded) first layer, it's the height of the bed. All the rest may be important, but, to me, the height has done it all.

As such, I was frustrated with using a screwdriver and wing nuts to get the height dialed in, so I came up with these parts.

The upper part controls the screw and the lower one holds a nut in place. If you can't figure out how they work together, I'll add a video or something.

Since I didn't have any hex hea