I have some of the 24/7 predecessors (FugeRay, Planted+) and I did not like how the mounting legs did not sit completely flush with the tank's rim. The inner ledge of the rim prevented this from happening. Also, it seemed like thumbscrews on the clamp portion of the mounting leg were making contact with only the very upper edge of the rim. It did not feel secure. On top of that, with the glass canopy in place, the aforementioned mounting legs would not even clamp on at all.
So I built some rails out of PVC
and mounted them onto the tank's rim. The rails provided more area for the mounting legs to clamp onto. You can see a pict of them in post #12 on the following thread: One or two planted + lights
There seems to be some problem with images hosted on the Imgur servers. Hopefully that will be resolved soon.
Also, not saying that the current setup won't work. I believe the mounting legs on the 24/7 are more adjustable than earlier models.
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