I'm a relative newbie to felling but last summer I got lots of practice in, safely out away from any structures etc, etc. I'm starting to eye ball some bigger trees as my confidence is increasing but am not sure if there is a "rule" about how large a tree one tackles with a particular length saw blade. I have an 18" saw and am cutting mostly pines with the occasional oak and beech. But one of the pines I'm looking at seems to be about 24" in diameter and obviously the saw isn't long enough to go through end to end. I've read about plunge cuts and other methods, but if you are just doing a notch and back cut, where would you draw the line about the size of a tree you can safely tackle with an 18"? And what would be the best cutting strategy to tackle that with? Come in from the sides slightly? The tree does have a favorable lean in the safe direction. Thanks!