Epoxy Scale

I saw one of these for a 5:1 epoxy mix and had to have one. My good wife has been mixing epoxy for me on all the big jobs but was very concerned about screwing up. Once I figured out the mix ratio by weight (it's not the same as volume), I found the balance point. Then I rigged a microswitch and flashlight bulb to even take the guess work of when the scale is balanced.