I have been looking into upgrading my Skywatcher 10" collapsible goto dobsonian focuser from a single speed to dual speed. From reading many post on this forum it seems the majority of us amateur astronomers go in order of increasing cost, a GSO, MoonLite or Feather Touch focuser. I was about to pull the trigger on one of the MoonLite focusers when I stumbled into another avenue to obtain a dual speed focuser.
First I have read many forum members who were replacing even the Skywatcher provided dual speed focuser because of the lack of machined tolerances, causing a shift in focuser axis with vertical movement of the drawtube. This was not my case. The single speed Crayford focuser on my dobsonian was smooth and had absolutely no drawtube shift. I just felt the need for finer focuser ajustment.
I found, it may have been on this forum, a upgrade kit for my focuser. The catch was it was not avalible in the U.S. but from an astronomy vender in Great Britain - https://www.365astronomy.com.
The unit I purchased is a Lacerta Dual Speed 1:10 Microfocus Upgrade Kit. It is designed for Skywatcher Newtonian telescopes with Crayford style focusers 8" and larger. They accept major credit cards and Paypal. I purchased mine through Paypal. At the current exchange rate dollars to pounds I paid $95 including shipping. I order the unit on a Friday and it arrived the following Thursday. Tracking was provided when it shipped via Royal Mail/ USPS.
I my view it is a quality item which preforms flawlessly. Very smooth and precise control. It caused no change in my scopes collimation and took about 10 minutes to install. For me it was a no brainer $400 for a replacement focuser or modify my fully functional single speed Crayford for $95.
Edited by elrod, 07 September 2018 - 07:56 PM.