I saw that Terra! The mount, pedestal and clock drive are worth it.
I'm on a budget freeze 'till about 2041, when I get the mtg. paid off. I'll be 91. Or I should say I would have been 91!
Anyway, I have the older, but nice Edmund medium EQ mount, courtesy our friend JW, and a set of wooden tripod legs arriving today, courtesy another fine friend. So I'll have a good EQ set-up, and maybe come across a 96 tooth drive some day.
There are probably many around here sitting unused, this being Edmund's back yard.
But that 4-1/4 is a nice buy for the money indeed. The seller said, "aluminized, overrated and spherical to 1/8 wave. Probably meant "aluminized , overcoated and spherical to 1/8 wave. At f/10 with a good diagonal, I'll bet that puts up some nice images!
By the by, what size diagonal are you going to use in your 6", f/6?
On my DOB that has a 7.5" OD sonotube, I use a 1.3" diagonal, giving me 22% CO. But I think that CO stuff is overdone. I should have gotten a 1.5" diagonal, and likely will.... in 2041.
With the smaller secondary I have to use a low profile helical focuser I had on hand. You twist it to focus. The threads are fine and it's good for fine tuning, but not for moving any distance. With the larger diagonal, I could have used a standard 1-1/4" R&P and gotten a decent size 100% illuminated circle. 1.5" is only 25% and I'm sure would have made little if any difference.
Edited by Joe1950, 17 November 2016 - 11:27 AM.