We are off the subject of the post but:
How far down will RX get below 9 with added TX boost, ( no way to know) and what basic loss of performance am I not realizing right now after the 5 loss, even in non-Boost mode. ( If you don't want to go above RX9 then none, if you don't use boost, none) Something had to have changed, and in RF,,,all variables are pertinent. (Yes the null has shifted) martin
Many people could be using your coil with an M6, MXT, or DFX and it would be perfect for those detectors and no loss. Many people can't use boost in their soil so your coil would not have any performance loss for them. Whites never claimed a person could use a coil with RX15 and boost. My coils all do, but it could change.