I've been at this over 3 years now, and I still I have my first scope, the Orion XT10 Dobsonian. I've made some modifications to the azimuth bearing and got that pretty nice now. The altitude needs some attention now. I've noticed a common difference in the production scopes like mine and the top-tier scopes of the same size/focal length....the size of the altitude bearings. Is that to have more tension or how does it hold a position without falling? Mine has the springs but if you don't have either one of the springs hooked on the pin it falls right down.
My XT10 has 2 little 0.75" x 0.75" teflon (maybe?) buttons on the rocker "arms" (???) and an almost smooth veneer of some sort on the edge of a +/- 6" diameter (pressboard/particle board) "bearing".
Looking at a similar size high end scopes, like Teeter, Moonlite, Obsession, Starmaster, etc. etc., the bearings on those are quite a bit larger, half circle shape of perhaps 10" or more diameter.
What am I missing? I'm wanting to lighten this thing up a bit and that would seem like a good time to do the same type modification on mine. One other thing of note, this is the spring-tension dobs, not the one with knob tensioners. I suppose I can, A, Get a longer similar tension spring or, B. Use a small piece of chain to use the factory spring and span across the new altitude bearing similar to current design?
Does it help smooth the altitude action or spread the weight better across the wider bearing? There has to be an advantage.