I have a 35p that is the old two screen setup with the metal diffusers, I keep threatening to update it to a three screen, the head unit will handle that. Think I bought it around 1989-90. It's always matched up well against other chronos and read 99% of what I shot thru it, it either reads it or doesn't. It is mounted on a piece of conduit tubing, 4ft spacing. Takes a moment to snap onto a tripod. I can usually set it up on a target change no problem, Once in a while have to adjust it at another change. I usually put it out first along with a target and then set up stuff on the bench and adjust if necessary next change. Also have a magnetospeed, works pretty well. Had it for 3-4 yrs now, only just tried it for the first time a few wks ago at an indoor range , rather use the 35P, easier to set up. Seeing as I have the 35p, I can't justify the Labradar for myself. It's cheaper to buy 3 new screens & diffusers for the 35p.