Some progress on the cover and replacing outer rails of lights with larger heatsinks, sans fans. Heatsinks are mounted on larger 1 inch aluminum u-tube than when I did the center one, so more material to draw away heat. The center rail has been running fine without fans & the 3/4 inch u-tube for some time now, no issues with the LEDs, so not sure whether I'll redo that one with the 1 inch material. Still need to yank the old rails & mount the LEDs on the new ones, but lights are on at the moment. Might get it done tonight.
Came up with some artistry to vent the cover. A bit of work with all the drilling, but I think it should look & be pretty cool once I have it stained & mounted.