Plugging and redrilling is alaways worth it because your hand is never the same as someone else's with respect to the necessary pitch. The wrong pitches can do a lot of damage to your hand PERMANENTLY while you save $5 - $10 being cheap.
While your saving $10 today, your orthopedist will be making $10,000s with surgery to fix your hands 5, 10, 25 years down the road, laughing all the way to the bank. That is if you're even able to bowling in 10 or 20 years.
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"None are so blind as those who will not see."