OK here's what I found so far. I have an F3 Diesel that all sounds work even while holding direction button but only goes forward. No reversing switch on bottom. And the key reset sequence doesn't seem to change anything. I also have a GP9 that needs a new battery, the 2.4v version, MTH 50-1024 but can't seem to find it anywhere for less than $14 delivered. Any tips there?
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