WVHunter, I'm using a Canon OWL-PF with a RS sensor, mounted in a Pelican 1120 case. I built the simple unit (wasn't simple for me, but thanks to the guys on here I prevailed!), with a DPDT switch. I made one mistake and cut a large opening for the fresnal lense, which is glued in place. I should have just drilled about a 5/8-3/4" hole instead. I had to cover part of the lense with duct tape to get the sensing area just right. Other than that, it looks really good. I'll post a pic of it soon.