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if you join national dragster you will get a magizine every week you can learn a lot from there then you wont have to ask so many questions
i went from a mag three to a 44amp i just swapped the the drives until i got my new base i didnt have any problems now i have the dunn drive...
well its not that hard to do with the right tools you need a puller to pull both gears at the same timemake sure they have a alignment marke on...
