Had problems with vertically printed legs so going to try infilling with plastic before switch to horizontalAll wires will have to be external but should add strength for crash and high torque motorsupdate 4/25/12 disliked vertically printing legs, can not resist torque forces.. Modified horizontal vampire arm to print 2 at once. Print came out great and can notice a incredible difference in strength.Design to print two legs at once horizontally.I would print sets of 2 in different colors to disguist the front of you quad.Add raft to keep contact with build platform better, remove after printingPrint Settings (Replicator) Infill 100% shell layer 2 layer height .27 speed 40