Please don't get annoyed because I'm just trying to understand this subject. According to the specs on the DX18 it has 2048 resolution on the first 10 channels. The X-Plus 8 module is designed to allow expansion of up to 8 servos for non-control surface functions such as bomb drops, lights, winches, retractable landing gear, and many more. These 8 channels only have the capability of accessories and are only 512 resolution. The JR x-bus technology can put any x-bus channel on a control surface allowing up to 4 servos per channel all of which can be programed individually. That is something Spektrum does not have. Both JR and Futaba have the technology, not just a 8 ch expansion system with 512 resolution that can not be used on a control surface. Am I missing something?