If I have all repairs done ahead and have the new tap or new drop with new tap already done I get between 30-45/hr on fairly flat or gently sloping ground, then I have some that if I get 15 an hour I feel lucky. Those numbers are if I can work without snowshoes, if snowshoes are needed, it gets slower. Then again, 15 years ago I did more per hour too, age has slowed me.
My main concern is not the number/hr but making sure every one is done right. When I used to have helpers, I checked often to be sure they were taking time to analyze where to drill. If they had not taken time to go all of the way around the tree, their choice of where to drill was highly in question.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.