Window motor repair, modification, will it work?

When I bought my 68 New Yorker, the previous owner said he repaired the driver's window motor. After only one day of ownership, the window no longer worked.
Luckily, he had drilled the door for easy access to the bolts. I found the gear stripped of all its teeth and repaired it using this kit.
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It wasn't long before it happened again, same problem, broken teeth. This time I bought 2 kits and was trying to be careful with the window operation.
2 weeks ago, while driving to work...

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Author: stain