I used to use them back when I was a 3.5 & 4.0. Nowadays I remove too much fuzz from the ball. Only Pro Penn Marathons can keep up!
5 x Head MGPMs: Pacific Classic Gut 1.25 x MSV Co-Focus 1.18
3 x Head i.PMs: OGSM 1.22 x CoF 1.18, Energetic 1.20 x CoF & PPA 1.25 x CoF