Hi folks, I picked up an LPL 7700 Pro a while ago in anticipation of building a darkroom. Since the latter has yet to happen I've not had a chance to try it out. However, I've had a tinker.... It has a knob that you twist to lock the head at a particular height and I've noticed that doing this actually causes the head to tilt back a little - possibly a few degrees. This suggests that I will have to be wary of alignment issues and that a bit of stopping down is in order. I'm a relatively novice darkroom user so any advice or opinions either specific or general would be welcome.