Dennis is one of my favorites. What a great sound. According to
this article/interview by Dave Roe with Dennis, he plays an 1800's Tyrolean, and 1800's German Roundback, a Juzek, and old American Standards. I was speaking with Dustin Williams a year or two ago and at that time, they were also prepping a Shen for Dennis to take on the road IIRC. Knowing Dennis, they are all gut-strung.
Thomas