SW35 was/is available as 4U version. I have 2 3U's and IMO it is not that demanding racket like everybody say. It's a MX80 balance. IMO it's a tiny bit flexier MX80 with a thinner shaft and a bulkier frame. I guess that JJS used a KRP one. For more details you must ask [MENTION=101636]Ch1k0[/MENTION]
I don't know if he used the KRP one but I wouldn't be surprised. The SW35 KRP is one helluva beast. But JJS is a beast. His technique when you watch the slow mos says it all.
Oh god, I have the Vapour Trail Elite 2015 and its retardedly stiff. I'm the only one in my group that can smash with it and it will still be a threat. I collect rackets in search of the strongest and currently can say 1. SW35/MXJJS/MX90/TK9900/TK7000S 2. TK6000/TK9000/NRZSP/ARCZSL/AT700/JSYYS, JS10 3. AT900P/TK Onigiri/Carlton KX80/Gosen Customedge Type Z/BS LHI