Hello Ron, Methods of access into trees vary widely but in many cases the use of a single system depends on your risk analysis and local legislation. Using a secondary or even a third system during cutting or other operations is often obligatory. We would suggest attending specific and recognised treeclimbing training and make sure that you have considered all the hazards associated with this particular type of work. An example may be to consider your immediate descent at any point during your ascent. This may be more possible with a simple prussik or other device than with systems such as you decribe. Be certain that the other technicians you are working with fully understand your techniques and that you also understand theirs. Enjoy the trees. Sincerely


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