I have decide to go ahead and try to build an articulated hollowing system like the Monster or the Elbo tool. I will be following the directions posted by CaptainEddie for most of the job. I have found that the proportions on the monster articulated hollowing system seem to be more appealing to me. I know several of you folks have purchased the monster system. Could someone give me the lengths of the 3 arm sections? No need to be exact close is good enough. Alas, if I fail at this I will be placing an order with Randy for his high quality set up, but I've just got to give it a try on my own!..Thanks in advance...Bill...