Well.

Guess who decided to try and adjust nozzle alignment,

Lets just say I now know to totally disassemble the extruders but there was a difference between the two nozzle heights according to the calliper's.

It ended up taking me like 2.5 Hrs to pull it all apart ( still had filament in it..oops ) and get it back together again.

Its currently doing a print so be interesting to see how much I have upset things, will know in about 2Hrs