I hear so many things about "Altered Bats".

Is removing the original bat grip and replacing with tape altering?
Some guys put a thicker or double grip on the bat to make it fatter, is that altering?
What about Knob Cuffs? How many Knob Cuffs can be put on a bat?
Is a thick amount of Pine Tar altering?
What about a rubber ring that goes on the knob?
Can weights be added to the grip?

Thanks for any info.

Altered equipment is discussed in Rulebook §3.4(4) ...
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§3.4(4) • ALTERED EQUIPMENT
A bat or ball is considered altered when the physical characteristics of a legal softball bat or ball have been changed (EXAMPLE: chilling softballs). Replacing the handle of a metal bat with a wooden or other type handle, inserting material inside the bat, applying excessive tape (more than two layers) to the bat grip or painting a bat other than at the top or bottom for identification purposes are considered altering the bat. Applying a foreign substance to the barrel of the bat constitutes altering a bat. (For penalty, see §3.4(6)). Replacing the grip with another legal grip is not considered altering the bat.

Sorry!
Just asking for a friend...lol :)

So multiple Knob Cuffs on a bat handle is legal?