28 is neat, but Id prefer to keep actual machining references out of the logo. The gear in the A is cool, but I don't want to be pigeonholed as a manufacturing company only and therefore dont really want that kind of stuff front in center in the logo.
Looks nice. I would see if we can get the font to be a little more bold in some way. The idea is attractive and clean but I think AMT could stand out more. Nice job.
Better. Font is now too weird for our purposes though. Swirly think looks good. I'd like to see a different font and perhaps a more gradual color gradient within the font. It just sort of looks like there's a line through the font at this point.