I've recently strung my Thruster K9900 with VBS63 @27-25lbs w/ 10% prestreched. At first, repulsion felt nearly as good as my Meteor X80 strung w/ Yonex Exbolt63. Although the VBS felt softer than the Exbolt, hitting sound were not as lively as Exbolt (I would say the VBS sounded rather dull). After a week playing w/ the VBS (playing 3times a week at club level), repulsion went down a bit. The Exbolt on the otherhand felt almost as good since day One. Personal preference, ranking 0.63mm string: 1. Yonex Exbolt (Victor Meteor X80) 2. Lining No.3 Boost (Yonex Voltric 80 Etune) 3. VBS 63 (Victor Thruster K9900) Sent from my CPH1613 using Tapatalk
I tried vbs 66N, it's quite good. With 0.66 I think NBG 98 and lining no 1 boost is good comparation. Normal BG 66 is too bad for durability. NBG main problem is the repulsion itself, even Yonex chart with 10 but it's so bad for 10. No 1 boost main problem is tension retention. Vbs 66N for me it's quite normal string but without a problem, so I prefer Vbs 66N. I already buy vbs 63 and will try it soon