Just drill a hole through the square knob on the screw top.
Not for a match case you don't. :P
Actually, I experimented with what you are describing. 1, didn't find they helped all that much, it just a leverage and hand strength issue. 2, wasn't sold on the water proofing of the modified cap. Kinda defeats the "waterproof" requirement.
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-IronRaven
When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.
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