I just picked up a used x50 for 50 bucks. Anyways is there a way to tell everything's in good working condition besides sending it in to escort? I've turned it on and no self calb error. I can pick up K band from maybe 1.5 miles or so by going to those speed meters so K is working. I don't know how to test ka band. My onkyo remote can sometimes set off the laser. I'm kind of worried maybe something is wrong with the laser because i'd assume if my remote can set of laser, it should be able to set it off every time but that's not the case. I know laser is kind of a if you're hit it's too late anyways thing but i'm one of the pple that's hoping I can pick up scatter to give me a warning.