[nizz]

rg550 with a fender 5 way.  dominion neck, ibanez s1 middle single coil, suhr ssv bridge.

Every position is perfect but the one combining the bridge and middle.  it is not hum cancelling but the position combing neck and middle is.   phase is good, its just not hum cancelling when bridge+mid are on.

[HarlowTheFish]

Hmm I think you need to swap the active coil on the bridge autosplit and/or reverse the bridge pickup magnet. For noise cancelling, you need to have two coils that are reverse-wound and reverse-polarity, but I'm not sure which would be your problem. Try swapping the active bridge pickup coil when you combine it with the middle, because it's easier, but if it doesn't help you might need to pop the pickup open and reverse the magnet.

[nizz]

Thank u.  I will give that a go!