Well--I kind of knew you wouldn't give in any. It's good you are "moving on". You seem to feel that if you don't have the answer no one does. When you're wrong- you're wrong. And, you are wrong! There are a lot more models of visual tachs out there than you seem to know of. Try looking beyond your narrow scope of believing that the R/C suppliers are the only ones that offer them. Even if you were right (you're not) on this your manner of response was rude, arrogant and un-necessary. It's true that one should learn to research for answers and the internet is a wonderful tool for this. But, civility is also a big part of the forums and youseem to lack a sense of that.
Farewell and good riddance!