I was trawling the net and came across an equatorial platform that you can put a Dobsonian on. It claims to give you about an hour of tracking and then you have to start again. The geometry of it looks clever as you never need to be actually tilting the Dobs base by more than a few degrees. The firm seems to have stopped trading so they clearly weren't selling enough of the platforms (which were fairly expensive). Have any PFstronomers ever used one or owned one?