not to deviate too far but with relevance... If I might add...I frequently switch between ovals and ISOs and it does helps in the transitionioning from regular ISO to slim and narrower ARC ZS. Anyways the other day, I brought my trusty Cab 20 & 21 (strung at 25/27), plus my NS9900 and ZRC ZS (strung at 28/30) and switch it around...I think it does gives better perspective on how to handle 'it' reliably for each individual racquet. It also helps with reflexes memory. Thus my transition to ARC ZS is a non-issue. There are times too that I bring non YY racquets, like Mizuno TC700, RSL X3 Gold, Gosen Aermet 8900 blue and mixed it up. And after a while I tend to be able to adjust much quicker to the type of play each individual racquet has to offer. Well, I say it a couple threads back, #1 for now is ARC ZS for all the power, pinpoint accuracy and speed it has to offer (again I must reiterate I seldom frame the shuttles) but my NS9900 is really tough to beat in terms of maneurability, speed and punch. So, it goes at # 1.1 Having the extra oomph I got from ZS, I still stick to my points construction game rather than smash it all the way. # 2 is definitely Mizuno TC700 for me. I hope future Yonex racquets will be built around ARC ZS's head shape! So that we can chose: oval, ISO or ISOval!