Anyone using them? I see that there is one now that is 360 degrees but not a rotating laser. PLS 360E to be exact. I am looking for a 360 degree laser with interior/exterior ability. Interior is basically visible laser and exterior is sensor, preferably audio with sensitivity adjustment. My understanding is that sensors require pulsating laser which is why they typically are not as good indoors. Any thoughts on brands? I will be working primarily by myself and need the laser for grade and form setting. Candidates so far are PLS 360E and CST Berger model 600 with sensor. Any advice is welcome especially if you own something similar made by another company. Thanks, Rat...