I would recommend using customized supports are on the cannon barrels. Removing support is extremely difficult. It may actually be possible to print all the pieces with no support. Author needs to resubmit files so each component is a separate file, I can provide them if the cannot. Printed at 0.2mm layer height, 20% infill, no raft, no brim. I need information on proper image formatting so I can upload the best quality image I can provide.