I know for sure that if you're looking to burn, then don't get the executive fusions. I have one that's been tested several times at 140mw, and it can't light matches from any distance. I went through 1 other executive fusion, and it consistently fluctuated between 124 and 130mw in output power over 30sec. In terms of output stability the fusions I recieved were pretty good. However, matches are a hit or miss. The first fusion I got lit matches (with a lot of effort), and had a lower output (126mw vs 140mw) than the fusion I have now (that can't light matches). However, the fusion that could light matches had a beam diameter of 1.2mm, and the fusion I have now is closer to 2mm in beam diameter. This makes a HUGE difference in burning abilities, since the intensity is inversely proportional to the square of the beam diameter.
I can't blame you for sending it back, you'd be better off getting a NOVA x-105 or 125 (if you don't mind waiting). They're much better value than the executive fusions, and they'll burn just about anything you'll want to burn.
