Other posts have referenced the flex in the baseplate, especially the A3 model. I'm certain part of this bendy aspect is the large span between feet. I've had some experience with 6061T6 aluminum and slightly less with 7075 grade. Can someone tell me with certainty the grade of aluminum used in the baseplate? If the precise thickness is known, that would be a bonus, although I'll pull out the calipers next time I have a minute and measure it too.