I think whether or not GB affects performance mostly depends of the ground's mineralization strength. Most of my sites have a high iron to salt mineralization ratio BUT the overall mineralization strength is very weak. I never get any bars on the strength indicator. My ground usually reads around 88. I think I could leave mine at 90 and forget about it. But I like to optimize settings so I usually manually set the GB a couple of points below in the hopes it will give me a bit better performance. But like I said earlier, because my soil is so mild, I don't think it setting it to 86 versus 90 really helps performance much ( not that I have noticed) but I will do it anyway.
If you have medium or highly mineralized ground.....you need to pay attention to GB, because it will affect performance.
If you have medium or highly mineralized ground.....you need to pay attention to GB, because it will affect performance.