Problem with focuser on Orion Optics OD300 F4 Dobs

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I bought this a few years ago but only started again recently after a 24 month forced break from observing.
Problems with the focuser.
1. Not nearly enough range of travel on the focuser. I'm using a Paracorr (visual) as an extension barrel.
2. More seriously the focuser slips back when I use any 2" eyepiece.
I would appreciate any advice on an appropriate upgrade for the focuser. I'm looking for one with finer focus control, greatr focus range and a brake that can hold a 41mm Panoptic (maybe thats too much to ask)
I've included a few links to illustrate. Each photo is about 2MB.
Meade LX90 12" LNT
Orion Optics 12" f4 Dobsonian
EPs: currently in transition state
Health: CAF (Chronic Aperture Fever). No known cure. Known to cause Dobs to expand into Obsession.
11 years 2 months ago #91238

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