RE: Kyosho Spitfire 90
It really is a great flying plane.!!
Im sure that 120 will fly her with authority and the draggy airframe will not let her act like a pylon racer.
Only tip, is like with all artf's is to ensure that the front box, that sits in firewall is secure, as often lack of glue is applied during factory build. This applies to a lot of models. So make sure you carefully add thin cyno or extra epoxy to these joints for trouble free flying.
I did, and never had a problem with the 90 spit and that was with a saito 125 on a 16x8.
This is my friends who was using a rcv 91cd
[youtube]http://www.youtube.com/watch?v=L8TSU732-MA[/youtube]
and two tegether rcv and saito
[youtube]http://www.youtube.com/watch?v=9K-L2XIHn_k&feature=related[/youtube]