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Originally Posted by Ruth
How do you double check on the bulkheads? I have the bulkheads already so do I just measure it with that? Explain please and thanks. Also I am not real sure on the bit. They are steel bits with what look like steel teeth - I am pretty sure they use them for acrylic but good point and I better check.
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When you buy a bulkhead, take off the nut and there should be a rubber washer/o-ring thing. The inside diameter of that o-ring is the size of hole you need to drill for that bulkhead.