I think the nice thing about it is the fact you can make it almost any size you like - up to about 3 metre wood lengths- I noted 2.4 lengths gave you the council max (no building license req) of 10 sq metres floor area - this is a nice size and fits well with 1200 x 2400 sheets of ply
Also worked out that it's possible to put wheels on the bottom plates and the whole obs can rotate.all you need then is a carefully crafted circularchannel in which to run the wheels and then you only need a 600 wide slot to zenith and make it turn with the OTA
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