When contemplating this decision the overall rule I wish to use is an element of 10 for my fixture element tolerance relative to my output component. For example: A laser Lower attribute could have a positional tolerance of +/- .005” dependant upon the laser. I've two AR builds. 1 Gwn2 https://iwatchsteelband13197.idblogz.com/33496178/positioning-ruler-for-dummies