I have an early Thunderfunk - second generation (slightly larger chassis, the first wave of upgrades - the originals were about 1/2" less deep and were exact copies of the Gibson GB440). This one has a "Factory Fan" BUT it's really a sorta prototype as it was one of the first - Dave punched a hole into the frame - before he bought correctly stenciled frames ... I probably should put up a picture. I am the original owner and have had this since 2004. Anyway, It's worth a solid $550 and I want a Mesa 12 Walkabout ... Any interest?