On Rick's site, there are pictures of an XR-2 build up they are working on. It has not been updated lately as Rick has stated they are working on many things all the time. Once they get this all worked out, you can count on them letting everyone know. There is a large investment of time and money and we all win with this one. Once some drag P7 engines get built and some testing gets done, we will be seeing some real powerhouse engines competitive with the bowtie crowd. Having worked with Rick several times, I can tell you for those that don't know him, he is a standup honest guy. A former comp racer and innovator.