RE: mvvs .61
Rajeev,
This engine would make adequate power for this model, for normal 3-D.
However, for extreme 3-D flying, the producer of this kit recommends a powerful .91 engine.
I believe the .91 from MVVS would be a better choice, since it has the same weight, but spins larger props with more authority.
I would recommend a 14x6 with the .61 and a 16x5 with the .91.