Great work, I love this.

I tested it with my recently restrung BG80 at 27lb and it came out with 26.69lb!

One improvement I'd ask for, is in the string thickness selection. I had to go look up the thickness of BG80. It would be cool if you could preload some of the popular strings in there.

Also, the string tension number is good, but I'll get it to a peak and then I'll stop to press the stop recording button and it's dropped back down. It would be nice to have a "Peak tension" or a graph of the tension.

Thanks