I'll see what I end up doing. I've already ordered the light back in March they just failed to tell me it was out of stock when I did so, so I'm kinda loathe to buy another light due to someone else fucking up but I might do it and dynamo another bike up. I do like the idea of the Beacon though.
Thanks but need it quickly. I'm probably going to go (shock, horror) with my old battery lights and battery packs given timeframes.