I only knew Guhl, and he doesn't do it now that it is illegal.
Let's get things straight here.
It's not illegal to tune your car/bike. It's illegal to remove emissions components. If you can pass inspections from your local area, doesn't matter if your car/truck/bike is tuned. As well, there are emissions compliant tuners out there.
I have passed inspections with tunes on all my rigs. They can't read your ECU. Thats a special process.
Yes they have gone after tuners in the last few years, but most of the tuners used to be offering emissions "delete" services.