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I have had one for a couple of years, and it works fine for my 80mm F/5 refractor. I don't use my 100mm Mak on it much, and the few times I used it, it was usable. Some shaking during focusing but dies down quick. I use it with the legs extended, but it would be more stable without the legs extended. I also sometimes use a stone bag to weigh it down.
Here is a thread about it on CN https://www.cloudynights.com/topic/6087 ... eq-thread/
You might need an extra counterweight for the C90. Look for the iEXOS-100 counterweights on the ES site, or the truss Dob counterweights.
Good thread. Looks like you discussed all the important points.
I have heavier tripods and extra counterweights already so I can experiment a bit before I decide on a next move or additional purchases.
Very helpful, thanks.
Any metaphor will tear if stretched over too much reality.
Gary C
Celestron Astro Master 130mm f5 Newtonian GEM
Meade 114-EQ-DH f7.9 Newtonian w/ manual GEM
Bushnell 90mm f13.9 Catadioptric
Gskyer 80mm f5 Alt/Az refractor
Jason 10x50 Binoculars
Celestron 7x50 Binoculars
Svbony 2.1x42 Binoculars
(And a bunch of stuff I'm still trying to fix or find parts for.)
The CW shaft on the EXOS Nano is 14mm so you might need a sleeve in the 18-20mm CWs.
Some report that an extension CW shaft of other mounts fits the EXOS Nano, so that could be something to try out, to get a 20mm CW shaft on the Nano.
Glad I found this thread. I’m struggling with just about every aspect of my ESFL EXOS Nano mount. This pointed me in the right direction with at least some of it. Thanks!