I saw the octopus and its predecessors and thought it would be cool to make. I loaded the single tentacle into 3D Builder in Win10 and noticed that it wasn't laying flat on what would be the build plate so I attempted to make my own raft material object and saved that, then applied it to the tentacle object. I modified the raft object in an attempt to avoid mashing it in with the joint areas while still supporting the underside of the tentacle. at this point (04.29.17) I have not printed it yet but I thought I would offer this model if anyone has had problems with their prints stringing out in mid air. I got the rafting idea from the Crocz object, aka the alligator clip which has rafting material built into the model, with little effort peels away from the build. Also using this rafting method reduces warping during the print process in most cases.