Keep on looking at the freak system. OK, it's a big initial outlay but seeing as paint to bore match is one of the most important factors in accuracy & also affects consistency & gas usage, getting a barrel where you can get the right match whatever paint you are playing with & whatever the atmospheric conditions are has to be a big bonus.
You have the added advantage of being able to swap fronts round depending on the position you are playing & change just the back if you replace your marker (or get a backup).