I did a swap plus cash about 8 months ago for a Tempest board. Pat told me he'd give me a 6 month warranty on the board. Well, unfortunately, the board started having trouble in the vector generator section about 7 months later. I contacted Pat, he told me to send it back. He then attempted to find and fix my old board, and when that didn't work, he found a board with the same rom revisions I had and mailed it right out, no questions asked. If you have Tempest troubles, don't hesitate to contact Komodo. Thanks Pat!