they're resting on top of a "wooden shelf" that slides back and forth but even that is starting to bow in the middle. and if you look at the one picture, you can see it resting on the wood with a "bar" in the middle. well that's blocking light so I have to get rid of that. This wood shelf was made for my photon 48 but I don't have that anymore so I gotta come up with something new.What are they mounted on now?