Hi There
Before considering a CG5 mount take a look at the following site
http://www.astronomyboy.com/cg5/index.html
I have a Vixen Gpdx Mount and had to have a few mods done back around 6 years ago as the mount was very stiff and was full of grease that was very
sticky.
The CG5 is the chinese copy to the Vixen GP and GPDX Mounts
They may improved things since but is something to be aware of
Regards
Dave