im 1/2 way between 30 & 40
its not about fatigue for me
i can roll 16's all day if i wanted, but i can do more with a 14 than i can w/ a 15.
i am not worried now about 10 pins, i was before i made the switch.
control is priceless in this sport imo
i have more speed, more revs, and more confidence
also more accuracy, ability to change hand position easier, blah, blah, blah
sorry to hijack your post DD