While your plane is on the bench, take it from idle to full throttle and back, quickly, a couple of times. Any hesitation and you should adjust your high speed needle until it transitions smoothly every time.

After this, get a helper to hold your plane nose-up. Give it full throttle and make sure it can hold rpm's.

The OS .46LA is a great, reliable engine. Once you get it dialed in, you'll hardly ever have to touch it.

Good luck.