one time a customer pick up a house ball and come in the shop and ask me to drill up the Zone Classic exactly the same spec as the house ball. Tried to explain to him that he can just get a plastic and will do the same, but he insist, LOL, all I can say is he got the money and is a customer. They can spend the money anyway they want, we provide the service and somehow we cannot just take care of the better bowler, casual bowler equally important. Also, backup is just another way to bowl, nothing wrong at all, we saw 2 handed and no thumb on TV too. Robert Smith bowl backup to help him win the tournament in Japan.
Hope this can comfort you a little. Bowling should be funful.
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Laufaye