Regarding taps per tree, I use 1 for 9"-23" if healthy, and 2 at 24"+ but only if the tree looks good and healthy. Never more than 2. I have hybrid vacuum, all are on 19-25" vacuum and then on lines that have at least 10' of drop I use 3/16 laterals. I had as many as 41 taps on one line, most were 3 or less, for next year all lines of 28 or more will be redone to split them in 2. While the longest (1100') with 41 taps still had vacuum on the lowest tree, I'm thinking it may have not been as high as it could be if I split the lateral into 2 lines.
I have only had 3/16 for 2 seasons and I'm still tweaking the system for better performance. In 2017 I had about 2/3 of the taps on a 638 tap bush on 3/16, next year it will be a 725 tap bush and about 80% will be 3/16.
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.