Thank you for the video explanation. Uploaded it link below
The top horizontal plate is only secured by its own weight right now, so i can change things.
About the lighting...
Since I have been collecting bits and parts for this revival tank (and made plenty of mistakes along the way) I now own two Kessil AP700 and one Odyssea 48" T5 fixture with 4 bulbs, all of which were excellent deals. thinkign and reading about it it seems the Kessils woudl be overkill and the odyssea a short term solution because of its quality.
Just couldn't find an ATI Sunpower 48" dimmable fixture ata price i can afford.
So i should have enough light.
Here is a video:
Centre Pompideux: Aquascape without sand