I have been reading all this with great interest. Some not so nice accusations have unnecessarily been made. I do not remember a letter ot McNabb, although I did design their relayless servo for them...many many decades ago. When I was making good money I bought just about every proportional I could find. I bought a Space Control when I saw Zel fly it at the DCRC Symposium. I paid $695 in yesterdays dollars for it. It had a problem with drift that I found was a factor of transmitter tube filament voltage change as the nicads went down. I never had a good flight as it always crashed my plane. I would send it back and usually they took six months to get it back to me. No fooling. I could call out there and Toomin and Ritchie were ALWAYS in a meeting and could not talk to me...although I was reduced to begging to get the durned thing fixed and back to me. Finally in disgust, I sold it and was happy to see it go even at a horrendous financial loss. I lost a lot of planes with that system. Odd, Hal DeBolt flew one and it was flawless, but I could not get him to tell me how he modified it so it worked as well as it did. I tried the Sampey..even visiting the factory once and found that Harry had filched the Citizenship receiver design, but he had problems with it. I remember Blake Honeycutt from NC at a contest taking his Sampey transmitter by the antenna and smashing it into the runway. He left R/C for about thirty or so years before he got back into it. Those radios, no matter how they were touted, were not the final answer and many of them were not what one would expect. My first real digital was a F&M which worked well and later a Bonner 8 ch designed by Bob Elliott later of EK Logictrol fame. Modelers today have no idea what a deal the get when they buy a 4 or six channel system for a hundred bucks or so...