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I too have had my Porta Mount 2 for a number of years, am thoroughly happy with it and will likely keep it long term. It excels as an easy to use, highly portable mount.
I have used it successfully with a 140mm f5.8 refractor weighing 9kg all up. At this level the tripod is the weakness - I use it on a pier, or a heavier tripod if travelling with a long heavy scope. Vibration and/or wind does become a problem above 100x with larger scopes on the mount and supplied tripod. This is mostly solved with a sturdier tripod.
The sweet spot for this mount are the smaller refractors, up to 100mm IMHO.
My mount is totally manual - I have two 300mm flexible handles to drive the mount manually. These make a huge difference to one's comfort and to reducing vibration.
I would be considering a heavier mount if you want to be successfully observing regularly above 150x.
Cheers
Steve
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