Well I tried to make one that turned out similar to the images that have been posted. I must admit I'm a little worried that the design doesn't really fix the problem as each half could easily be dropped into the base and since it weighs a bit would do a fair bit of damage to the mirror.
The original design I had in mind would be a circle that had a diameter bigger than the top of the tube hence couldn't fall in.
I've got another possible solution I would like some opinions on (SEE PICS)
The orange is MDF smaller than the diameter of the tube so that it doesn't get stuck on the trusses.
The blue is foam, about the same size as the diameter of the tube.
The hooks go over the tube to stop the foam falling down and touching the mirror.
The idea would be that it would go in like a plug and stop any dust getting on the mirror, The 2 pieces of timber would hold it rigid. I might need to cover the foam in material.
Anyway's what does everyone think???
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