I would find someone in country who's worked on PTWs and let them see the damaged electrical system.
The PTW circuit board is sensitive to damage and depending on what the copy is like they may have re-produced that sensitivity. If it's merely a motor problem then maybe swapping in a proper PTW motor will solve it.
As said before though; since no one here has said they have a CTW no one here can give you hands on advice or tips at this point in time.
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