The Xtar Warboy is my first headlamp ever. I won it in a GAW (on the other forum). Before that I used smaller lights with a reversed clip on my cap.
One of them the Notecore EA11. Being kind of a flashaholic I have more lights than I ever will need but this light is a fast runner up on my shortlist.
What I like about this light is the deep clip for wearing it in a chest pocket. That is almost as useful as a headband, when you’re one hand short for a job, but without the fuss of strapping it on first. This review shares my idea about its power to weight (or size) ratio: a lot of punch in a very modest package. Luckily you have the equipment to support that idea. You measured more than 1,000 lumen from this light, a did old4570 in his review.
Last but no least: your review more or less puts an end to my regret of being to late for last years group buy of the Spark SG3.
And thanks for the return of the sidekick.