Sorry to hijack your thread,
@seangee but here are a couple of photos of how you can fit tubes into ND Aquatics lids
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They put two strips running front to back under the fixed part of the lid. They did use plastic T8 clips but these tubes are between T8 and T5 so I replaced the plastic clips with metal ones which are more flexible than plastic and can fit any size tube.
The cables come out of one end of the tubes, I have them at the right hand side and they go out through the hole at the back of the hood.