To use the engines and rudders to walk a GB sideways doesn't work. There are two main reasons for this, one being the rudders are simply too small and the second, they are too far inboard to crate any significant thrust. I replaced mine a couple of years ago with 42% larger stainless steel palmed rudders. These rudders gave me better control in close quarter maneuvering, but I still can't use them with the engines to walk sideways which I didn't expect anyway.
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