Single Upper Ring On Truss Dob

I'm planning to use a single upper ring on my latest creation.

Reasons why: Lighter weight, looks cool.

Reasons why not: Harder to attach focuser & finders, harder to baffle, more prone to dew on secondary.

Who here has a single ring up top and why?
Thanks!
Bill

Hello Bill,I think there are quite a few single ring tops about now. I used one for mine which I finished about a year ago. I can't post a picture as my old laptop with its stash of pictures has gone belly-up. Here's a link to a website that describes it though;
http://www.freewebs.com/brucemills/20inchf4telescope.htm
Other sites that guided me in that direction were Greg Babcock's and Bruce Sayre's. Easily found.
I can't say that I'm hundred percent satisfied with the result though,as I think to detect a very tiny bit of flex which I strongly suspect to be the ring as I drop it in altitude,that is,watching the LaserMax collimator's pattern in the secondary. I'm fairly sure it isn't from the truss set up. I am in fact working up to having another go at the top ring,maybe by employing two thinner rings (-maybe steel?)with a spacing element
I'm totally happy with the pyramidal Dural spider though,and the rest of it. I don't recall any difficulties with the focuser and finder arrangement.
Oh yes,don't forget the baffle. Even now I've yet to make one!

Bruce