Here's a pic of what I've done so far with my mounting fixture. I apologize for the crappy cell phone pic. As you can see, I've got a single piece of conduit with one 90 degree bend. I had to cut the pipe on both ends because it was too tall, and the overhanging portion extended too far beyond the tank. I used the cheap pipe cutter shown in the first post. It took a little bit of doing because I think the pipe cutter is really meant to cut softer/thinner pipes like copper or pvc. However, I was able to get nice clean cuts on both ends. I used some WD40 to lubricate the area I was cutting as well as the blade. I had to rotate the pipe cutter 4-5 times around the pipe before it cut deep enough for me to be able to re-tighten it. It wasn't a fast process by any means, but I accomplished my goal of getting smooth, clean cuts.
The pic below also shows the basic hanging mechanism for my Finnex Ray 2. You can see that I have 2 conduit hangers serving as the base of my hanging mechanism. The screw holes of the hangers are facing downward with the S-hooks plugged into them. Attached to the S-hooks are the aircraft wire cables with the 2 cotter pins (see pic in the previous post). I'm happy to report that the cotter pins fit very nicely into the mounting bracket holes of the Ray 2. As you can see from the pic, they aren't currently attached to my light fixture because I'm not ready to hang it yet. Still, the pins can be inserted all the way into the fixture so that just the eye of the cotter pins are exposed. I inserted the cotter pins in such a way that the eye/hole faces up/down (i.e. if you were threading some sort of hanging line, you'd have to thread it vertically rather than horizontally). I'll take pics of how the cotter pins are inserted when I put everything together this weekend. I still think it might be possible to use 1/8" x 2" cotter pins, but the ones I got (3/32" x 2") work just fine. Also, the 6" aircraft wire key chains definitely have a wide enough diameter and will work perfectly in terms of providing a uniform hanging mechanism for the Ray 2. Overall, the aircraft wire key chain along with the cotter pins works nicely as a hanging mechanism for the Ray 2.
Note: Don't mind the piece of plastic attached horizontally to the wall. It's just a hanging bracket used for a picture frame that used to be on the wall.
Overall, I'm pretty happy with how the hanging fixture is coming along. Given the height of the conduit, I can hang the Ray 2 and get anywhere from 35-75 PAR at the substrate. I think I'm aiming for something in the 40-ish PAR range since I only have DIY CO2, so I'll probably have to add 2-3 S-hooks on each side. I also didn't account for the fact that the bend in the conduit pipe won't allow S-chain to hang straight down with the Ray 2 being centered properly over the tank. I'll have to move the conduit hanger on the left side in a little bit, and the S-hook chain will flare out a bit towards the tank just a bit. Fortunately, I can play around with the positioning of the conduit hangers, so I doubt this will be a problem. At any rate, I'll post pics of the full process when I complete it this weekend.
Last edited by rcs0926; 08-08-2013 at 04:30 PM.
Reason: Added details