I would say there is no need to contact Horizon right now. Just run some fuel through them both. They need some wide open time. I wouldn't bother with heat cycling them, or anything like that.

You didn't say what fuel you are using. Try 15% and stick with that. Also, ditch the plugs that you used to break them in and put in OS A3s.

Evolution did claim for a short time that each engine was run on the bench at the factory. They dropped the claim pretty early on.