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Old 10th December 2019, 08:14
kon kon is offline
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how about a medical punch? something like this:
http://www.agarscientific.com/miltex...h-with-plunger

There might even be a saw-toothed style version too, for the bigger sizes, which should allow even better control while spinning it, and hopefully shouldnt do much damage to the grp.
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