Don M.,
Your Saito 270 twin may be a bit much for the Sukoi unless you prefer FAST!! planes. A friend at the field where I fly has the slightly larger H9 260 with a Saito 300 with the twin carbs and that thing is nothing short of a rocket!!
. Just my two cents worth.
I have to admit that the sound of the twin in his plane as it goes streaking across the field is AWESOME (when you can hear it over the prop bite)