More like a butcher-mechanics, eyeball-metrics. But, it's sturdy, straight, and will hold up.

Will break in the dle 20 on airframe, wringing the control surfaces nonstop to see how many mah I drain for a 12 min flight. The same setup has been good to me on another plane. I assume that I can easily get 4-5 twelve fin lights w/o worry bout battery running out.