SummaryHere are the (very) long overdue Crossfire and Crossfire 2 Arms and accessories. All the arms are compatible between both platforms and address most of the issues people have had in previous versions. Both the original Crossfire and Crossfire 2 arms are included along with the 3.0 arms. The 3.0 arms are basically a modular version of the previous arm. Using the arm without any legs attached is perfect for using with Skids attached. The arms also have two areas to add different types of legs, under the motor mounting area and mid arm. They are snugly press fit in and in the event of a breakage only require that piece to be reprinted instead of the entire arm as in past designs. As always, weight is one of the largest factors with anything that flies. I received many requests to beef up this area of the original arm as it was the most likely to break in a crash or hard landing. But crashes and hard ladings can break even strong parts and anyone who has printed these arms know they take the longest out of any of the parts. Why waste all that time when you can print out just a replacement leg in just 15 minutes? There are other improvements on the near horizon. Thanks everyone for printing, flying and most importantly your feedback. Donate Update 7/26/15: I added the sketchup files of the arms for all your modifying needs. New arms coming soon! Update 2/27/15: The Arm 2.0 Tall/Short and the Arm 3.0 files have been modified to also accept 25x25mm bolt patterns such as the AX-4008Q-620KV motor. InstructionsPrint at 25-100% infill with 2-3 shells. I print my arms and legs at 50% infill with ABS but others also have success with PLA despite being more brittle than ABS. Only the Standard Leg needs to be printed with support. Press fit into arm. You can also add a very small drop or two of glue between the Standard Leg and the arm to make it a little more resilient in a hard landing but it is designed to pop off instead of break during a hard landing.