Gary: How big of a deal is that Negative and Positive shift on radios? My cousin uses Futaba receivers with his Airtronics M8 and has no problems at all. I always thought that if the radio and receiver were on opposing shifts that it shouldn't work at all. I have also heard of other people miss matching their components and having no problems! Is it just a range reduction if you are using components on different shifts or are there supposed to be other problems associated with it? My nephew got a Multiplex Profi radio and had the shift changed over for his Futaba receivers (as per what the guy at Multiplex told him to do), and it seems as though it may have been a waste of money to have it done, because it appears that it isn't all that necessary!