Larry already synched your carbs and road tested them before he sent them back to you, so it should be just a plug and play situation.
Joel in the Couve
No two engines are the same,,the compression is different on different engines, and can be different on each cylinder in the same engine. Valve condition and setting can also make a difference.
The carbs are probably close to being synced but may not be perfectly set for Ev's engine.