The recone did not go smooth (tried 3 times), the motor ID didn’t quite work with our 4" voice coils and our heavier moving mass may be hindering a bit of the output especially because our coil is wound down half way. He can get more excursion out of it, but there is a quite of a bit of flux modulation in that motor due to a lack of copper or aluminum and there is some really awful distortion that is not satisfactory. RE doest add shorting rings in there motors, I’m not sure if that’s the entire problem, but we tried 3 times to correct it without success. At this point we can try a pro audio top assembly which worked great on MT, but its risky to spent more time on this destroyer because it still may not be any better. There is quite a bit of distortion and some frequencies so we're going to work something out with Evan to make it right. The recone was done the best we could and I'm not happy with it, but i thought i would share since everyone here is so intrigued by this... which does puzzle me.