No, I don't own a Pro Connect Mark, or any Kalkhoff, but I like both the Pro Connect and the Agattu and I would definitely own one if I had the space to put it.
My current bikes are both drastic conversions of eZee bikes:
The Q bike
The T bike
As this thread concerns an eZee battery test for the manufacturer, it's not really an appropriate place for me to answer your main question, so for diplomacy's sake I'll send you a PM.
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