Very cool to see your progress so far, Chris. You're at the point with the top that I always thought seems the most critical and also fun -- the tap tuning. I've seen some pretty amazing vids on analysis of resonance response and so forth. There's one by Dana Bourgeios that demonstrates the depth of approach, methodology, and analysis tools he uses when shaping the braces that blew me away. Amazing! Wouldn't doubt you've seen it already.
Can't wait to see and hear the finished product. Love watching your builds!