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I know nothing about Takahashi specifically, but if the R.A. drive is a simple on/off switch, all you have to do is reverse the polarity as you suggest,
and then use it as normal.[this assumes that it uses a D.C. motor, not mains voltage A.C. like my Celestron C8.]
Where the only problem could lie is if the R.A. control is a hand
controller that has the ability to vary the drive speed, or any other
possible function; in which case it will almost certainly contain a diode,
which will burn out if the polarity is reversed. You can prevent this
happening by switching the diode to the other cable, so the current is still
passing through the diode in the original direction.
Hope this helps
raymo
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