AKKAMAAN
ArboristSite Guru
Sorry about the confusion of the jump from 16 to 20, didn't relize I had done that even after it was pointed out to me...as for the rest of it, it all about quick and dirty estimates, not intended to be sicientific. Don't use it if you don't like it....
Works for me...ymmv...
Do not worry about it......I kinda read between the lines how you were thinking...just tried to explain what was behind it....sometimes guesstimates are good enuff.....:msp_cool: