After doing some tapping on the top with and without the bridge support I broke it off. It dampened the sound from the box by a good 1/3. I'll wait to try it again when I make a box out of 1/8 ply.
Yes I started on a diddley bow but can't bring myself to make a one stringed instrument. I"m a coward...LOL Instead it'll be a 3 string meant to be played like a 2 stringer. The two lower strings will be close together for cording. Leaving the higher string free for slide use.
I can see were a band saw is a God send when working on these things. Using a hand held jig saw is challenging. Lots of sanding to do afterwards. LOL