At this point, you need customs.I actually got to try the Synergy Elite boots in the recommended size. They hadn't been heated. They were the correct length, however they would need to be punched out a small amount to accommodate my toes, but there was masses of space above my toes in the toe box and they were much too wide in the heel - both things that can't easily be changed by a bit of heat molding
Interestingly the fit was totally different to the Debuts I tried on, as the toe box of the Debuts felt tiny and the tongue of the Debuts pressed right into the top of my foot / toes.
I was also surprised that the boots were not only much too wide on the heel but seemed to get wider going up from the heel and didn't have any padding to help lock / hold the heel in place. I tried lacing them as tightly as I could but I could lift my heel a fair bit as there was nothing to hold it in place. I don't have a particularly narrow heel or ankle so it was a bit strange.
The skate tech said he couldn't make them narrower, and even if he did the little padding that was in the ankles would soon compress and mean I wouldn't have any support.
Good luck!