I always manual GB. And the soil here in Missouri is very good for the most part. I only use the 12x15 in fields. When I GB the 11” coil it balances out perfect, usually 3-5 numbers that are completely silent so it is obvious where the sweet spot is. The 12x15 balances, but it is a lot more noisier in the sweet spot. I have 2 nox’s, so one day I GB the 11” coil in the exact same spot I had just GB’d the 12x15 and it was perfectly silent in the same 3-5 numbers the 12x15 balanced in. Every time I balance the 12x15 I know it’s balanced but it’s just not the same sound as the 11”. I do very well with both so I know it’s balanced but I just wonder if I’m losing some performance because it isn’t as silent as the 11”. I never use the auto balance.