From Erik's Facebook page earlier this week:

Looking forward to playing this Friday. Yep, the Thunderbolts are doing a rare appearance with a long set at Fat Cats in Lake Geneva! Been such a tough past couple years health wise for guys in the band, and really happy to be doing a show. Yeah, my chain sawed leg is still funky, but it's nothing compared to the stuff the other guys have been fighting! If you are in the area stop by! We'll likely go on at 9:30 or so, then there's a band after us.