Rob,
Just noticed you post re advice on a smaller alt az mount.
I have had the original Vixen Porta Mount nearly 2 years, yes the Porta II is better - only as regards quick & easy stowage - otherwise no diff.
Today I installed a
JMI Micro slew motor kit courtesy of Daniel (IIS Dannat) thanks Dan.
These are a sinch to rig and work on similar system to Celestron / JMI Motofocus - 2-3 sec ultra slow (or blip then full rate for selected speed. Simple but effective fine control & no vibs. I have had Motofocus on the CPC8 for 3 years - love it
With the Porta Mount axis adjusted just so, you just push to near your chosen object and the Micro slew does the rest - nice & smooth. Make sure you use rubber pads under the tripod.
Motors seem more than adequate for my WO M80II EDT with 2" diag, extension tube & Naglers, so a Lunt 60 won't even be noticed.
Hope that may be of help
David