Do not know why you would ask that question if you own a tumbler. It seems easier to just throw them into the tumbler than to go online and ask about it. Tumbling would not hurt them even if they did not "need" it. When in doubt, tumble.
Sometimes you get what you pay for, sometimes you only pay more for what you get.
Three shots are not a "group"...they are a "few".
If the Bible is the literal, infallible, unerring word of God...where are all those witches I am supposed to kill? (Exodus 22:18)