I have had Zero trouble hitting 44/375s for distance with my Asa Z's... That's just my experience though... I have been swinging one since last summer and since may have 5 in game swings with another bat... These things are no joke..
Your idea of being afraid of not dying is kinda what motivated me to seriously persure a lifestyle change and knock weight off... In November I was at 385... The fattest and most unhappy I have ever been... This morning I weighed in at 318... Better but not yet near where I need to be... Prolly...
I agree with some of the above bros... I switched to turfs and have not regretted at all... I'm a rather big fella and the turfs are much better on my feet... Just my opinion..
Yelp bro have one myself... Don't know what causes it but mine will spin like crazy... Prolly has 300-400 cuts after it started... But still mashes with no sign of stopping... Not sure how you could fix it without popping it out..