Im strongly considering this mill over the grizzly version the dro is nice but mosly because the head tilts to 90 both directions those of you that have them how do you like them how are they to tram after tilting the head how does the head tilt work is there a fine adjustment or do you just move head and tighten and tap into place ??? Also has anyone got one and added the pdf later ??? I've never done any boring and wonder if it's worth the 300 bucks extra ???