My sister plays with the Ti10 which is a head light racket in 3U-G4. She cannot play with the AT900T 3U-G4, but since I lent her my 4U-G4 AT900T, this has become her new weapon. She is equal fast as the Ti10, but has more power. Just an advice for Shoutsu from swithing from the NS9900 to a Voltric. I (we) have the VT70 3U-G4 and the VT80 4U-G4. The swing feeling is equal for these two rackets. I think the 3U will feel a lot more headheavy, just like the AT700 balance. If you can play with the 3U Armortecs, there shouldn't be a big problem switching to the 3U Voltric.