Not really a true Taint set, and I may not be remembering correctly (it was 20+ years ago...), but I think Keith made a guest appearance along with Jonathan Canady during Slogun's set at the God Blast America fest. I know he was definitely THERE, and I'm pretty sure he did get involved, but not 100% on that, or even if he did, that he appears at all on the GBA DVD that's out there. Might be worth looking up for anyone who has it.