I dont know why 8.1 jap gamers are worried I bet that GW will work on 9.3 Nintendo hasn't even blocked sky3ds so what's the chance of the blocking an exploit before its even released!
Yes it's like the nub from an IBM think pad, it's very sensitive and accurate.
maybe the Gateway 9.0-9.2 update is based on ninjahax which is now blocked by 9.3, we shall wait & see