Wandering along the road the other day I had a brainwave and decided that the fixing brackets for aerials may be just the ticket. A 10 minute surf later and I came across this place:
aerial supplies
My idea is to buy one of the big (12" square base) patio stands and screw it into the floorboard behind the sofa (making sure that it is low enough to be well out of sight). I may need to screw down a bigger square of ply on top of the base to extend the base size and make it more stable.
Then I'd get hold of a 5' or so long pole which would slot into it. This long pole could live lying down behind the sofa when not in use.
then I'd get the smaller (19cm square) patio stand and screw this permanently to the HS-10. (Because the HS10 would need to be upside down, I'd screw a piece of ply to the patio stand then hang the HS10 from this in front of the main pole) then I'd simply be able to slot this on top of the pole and Bob's your uncle. My projector is behind the sofa, level with the top of the screen and square-on to the screen wall.
My only query now is what to use as the pole. I could get an aerial mast from the same company but I think it would be very heavy, have sharp edges, make your hands black, and probably be too tight a fit - I want it to slot in and out snugly but not so tight that it's impossible to remove. A better alternative would proabably be a wooden pole - somethng like a flag pole or the main upright from a garden parasol. Anybody got any suggestions for where I could source something like this? What about a plastic pole?