Kit is £145+70 for one of smudge's batteries with a charger. A built up light is £175. You get a tiny little cnc'd light that sits directly over the stem, has six of the very latest spec Cree XP-G led's and puts out around 2000 lumens. As far as I know, the first fifty lights Troutie has made have all been sold, but there is almost certainly going to be more made. The beauty of Trout's set up is that he's constantly playing around with ideas and suggestions from those using his lights, and has a very enthusiastic cnc guy who puts his own suggestions in to make the light even better. Trout started making a pretty crude design that worked very well, that has transformed into a very stylish, neat little light. I received my light this morning, and I couldn't believe how tiny it is when you actually hold it. I opted for the kit, so that when led's improve, as they are soon to do, I'll know how to take the light apart and install new emitters. The forthcoming S1 Cree's will be 400 lumen each instead of the current 340.
He also has a smaller 3 led light that has slots to allow for use as a helmet light, called the Baby Trout. I suggested putting a red led on the back, and found Trout had already made a prototype for someone with a pair of red LEDs, but reckons he can independently switch them. That's the sort of feedback that has made the light so popular.