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I always thought that Patrick Moore's solution to the problem of the moving eyepiece and finder position on a Newtonian was rather elegant - a rotating head (for the secondary, eyepiece, finder, etc) on the top of the telescope. This allows for a nice rigid connection for the OTA to the mount, and means you are only turning the top end of the tube, not the whole telescope. As long as the secondary is properly centred on the slew bearing for the head, it should retain collimation in any position.
The octagonal tube also has removable panels for faster cool-down.
See attached photo of Patrick Moore's 38 cm, taken from "The Caldwell Objects and How to Observe Them" by Martin Mobberley. (That's Martin Mobberley in the picture, not Patrick Moore!)
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