I have always used butterfly tires without boostering, but since I tried the booster I noticed that the ball, especially the hard ones in ABS, the ball (slips less on the rubber) with the booster is more friction.
I mainly boster this reason and then because "I feel the ball on the rubber more" is my personal feeling and I like it more.
When I used the hawk I did maximum 2 layers since the gum then became too soggy (soft) with the kalin does not make me the same effect as the hawk, so I do 2 max 3 of them always waiting between 1 layer and the other 30 hours.
I mainly boster this reason and then because "I feel the ball on the rubber more" is my personal feeling and I like it more.
When I used the hawk I did maximum 2 layers since the gum then became too soggy (soft) with the kalin does not make me the same effect as the hawk, so I do 2 max 3 of them always waiting between 1 layer and the other 30 hours.