Chris,

First off, when you tried moving the trim tabs (tab full, rev, tab neutral) I forgot to mention the tab should go back to neutral.

Your setup is 'Non-Standard'. Tamiya has the throttle and turret on the left stick (Stick 1). This shouldn't matter, but if the above doesn't work, you might want to reset the DMD per page 22 in the Assembly Instruction.

I've attached a copy of the booklet I talked about that details the operations of the Pershing. If you need a copy PM me and I can send it to you.

Good luck

Kevin O'C
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