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once again whats the time requirement to learn to use the electronic hammer, wagnaw says resisto graph is 2 seconds, so how about this tool and digital set up?

thats the 1 drawback to trying...liability thats the only thing that sucks about being certified, being held more accountable than others i get A mixture of trees that it would be nice to know more about the internal condition of some of these trees, before i say it's ok to keep or tell them to...

I do a bit of consulting and reports, usually old big trees. when there is a suspect hollow tree, I sound em and use drill, occasionally an increment borer(lets not argue over wounding, :cry:) I have been wondering about the use of a resistograph, i wanted to know, 1)how deep into a tree...