Vo-

The 120 seems like way more power than you need and a lot more weight than you want. I am finishing a GP .60 Cub. It was my first kit to build and went together real well. I am installing a Saito .91. Do you already have the 120? If so, I would go to a slightly larger kit, like a Sig 1/4 scale. If not, I would get either the OS or Saito .91. There is no real reason to overpower a Cub.