By the way, Will, you have done a very nice job... not only making the light, but reporting it and explaining to others how to do it. In fact one of the best "step by step" I have seen.
IMO a P7 direct drive is one of the best mods to do on this hosts, as it is "easy" and the results impressive.
More suggestions??
A flood monster with 3-4 P7/MC-E's is a nice project too, or a superthrower with 4 XRE and aspericals... what about a high temperature battery pack, short runtime high CRI flood light for video and photo applications?? (This can be done with the new 50 Watt LEDs, or with 4 MCE's warm-neutral.).
This one.. in fact I would love to have one. Make me a one of them and I will send you all the hosts in exchange.
Javier