Don't have my 4U JJS anymore, but from memory, 4U JS10 is slightly flexier and much more head heavier... like having an extra 1-2g lead tape at 12 o'clock of the JJS, thus contributing to its slightly whippy feel. Edit: I'm thinking that both shafts are probably of comparable stiffness, but the extra mass of the JS10 head makes the shaft behave slightly flexier.
I didn't have too much time with my friend's 4U VTZF2, so can't say. But compared to my previous 4U JJS, cuts thru the air faster, easily more power, but slightly less maneuverable.
Great insight into the racket, visor. Any chance of a comparison to the BS10? I only have one remaining and the fact that I'm having a lot trouble finding any more in Hong Kong is forcing me to look to other rackets, sad as it makes me. I can't stress enough what the BS10 can do for my play. The stiffness of the shaft (no jokes here ) gives me control and accuracy I've never managed with any other racket. My clears, drives, pushes and drops go so close to the lines that I often think that I wouldn't be able to place them better if I went over there and dropped the shuttle from my hand. The same stiffness also brings great power to my disposal when smashing as the energy is a lot more concentrated when compared to rackets with more flexible shafts. In comparison, my BS12 (the normal non-KRP version) plays terribly. The shaft is too soft and the same pinpoint shots that I like to play are just all over the place. Makes me think that I may as well be playing with a sausage for a shaft. Power is also a problem because it feels like the energy just dissipates from the shaft, resulting in a lot less power compared to the BS10.
Victor signs Boonsak http://www.victorsport.com/news_detail.html?id=8618 He will be using JS10 according to Victor Singapore facebook https://www.facebook.com/victorsport.sg
[MENTION=3480]xofrevlis[/MENTION] Glad to help out. My usual go-to is RKEP XP70 which is quite stiff (but not as super stiff as MX80), and I've used extensively MX80 and for a short while BS12, so I understand what you mean by precision of stiff rackets and power diffusion of flexy rackets. Unfortunately I've never played with BS10 before, so can't compare. But from what I understand, it's stiffness and directness is almost up there with MX80. Compared to a 3U BS10, the 4U JS10 is probably more demanding and powerful at the expense of maneuverability. For it's 82g 297mm dry specs, this thing swings and packs a wallop comparable to a 3U racket 4g heavier like my 8PS. I'm even starting to think a 5U JS10 would even be better for fast flat counter attacking doubles play. Whereas the 4U would work out better for singles play. Does that make sense?
Seeing that Ponsana just signed with Victor using the JS10, most likely the heavier 4U version, this would seem to support my theory about the 4U version application for singles play. (*me running off to check Eric's listings to see whether he still has some 5U available... )
[MENTION=57143]visor[/MENTION] I neglected to mention that my BS10 is 4U. No idea what the dry weight of it is, but with one layer of overgrip, the balance point is at around 287mm. As it is, I can't really feel any weight on the head, making it super-maneuverable when defending or with short, sharp actions at the net. With the BS12, the head definitely feels heavier ... I can feel the weight being dragged about for the same type of shots, but for some reason there seems to be very little compromise, if any, when maneuvering it about. It's probably the effect of its aerodynamic design. That said, what do you think makes the JS10 less maneuverable? Perhaps the balance of the racket is closer to the head or maybe the design has more air resistance than the BS series? It makes perfect sense when you define the racket as either singles or doubles oriented according to their respective weights. So when you say that JS10 5U is the counterattacking doubles player's dream, that has me salivating.
^ Wow, a 4U BS10 that is 287mm... then even the 5U JS10 may be too head heavy for you. My 4U one like I mentioned earlier feels just a bit less head heavy in swinging than a 4U VTZF. To put into a reference for you to understand, it would be like putting a 2-3g lead tape at the top of your BS10.
Oh, so it's the head-heaviness that makes it just a tad slower. Doesn't it say 'head light' on the shaft of the JS10 though? If I bought one at whichever weight I can still tailor the balance point to my liking by adding weight to the shaft. I didn't do anything special to my BS10 to get to the specs that it is currently at, but I like it for my style of play, especially as I like playing more at the front of the court. I'm lazy, alright?
Yeah, it's not head light for sure. Safer for you to get the lighter 5U and add tape or weight as necessary onto the top frame. Adding weight anywhere else does not affect swing weight at all.
I have no idea why I said add weight to the shaft. What I meant to say was add it to the grip. I've not looked at the JS rackets very closely in person, but am I correct in saying that the frame is not as sharp as the rackets from the BS series?
^ Yep, JS frame profile is not as sharp as BS series. So it doesn't cut thru the air as well. But the JS10 being so head heavy cuts thru the air incredibly well once it gets going... better than 8PS. Probably due to less air resistance from the smaller frame and thinner shaft.
