The Evo .45 has a lot of power. It pulls my heavy trainer around pretty good with 11x7 props, so your plane should perform even better.

I suggest that you take the baffle out of the muffler. Also, did you remove the weighted flywheel on the .45? If not, replace it with the cheap Evo replacement. Costs around $3 and is much lighter. As for checking the CG, maybe somebody at your club should assist you. Buy some segmented weights at the LHS and separate them in 1, 2, 3, and 4 segments. Drill holes in each one, and take a couple of wood screws to the field. That way, you can add weights easily to the bottom of the fuselage as needed. I did it this way over the weekend and it is a good solution. You can cover the screw hole easily if you need to.

If you are not clear of what MAC means, you can find it by doing a search here on RCU. I don't know any links right now.

Good luck. It looks like you should enjoy the plane and engine.