I did put it in that way on purpose, after reading an article on Peter Green's (the "greeny")
I can always spin it if it sounds crap. ...
... Some say he flipped the bar magnets under 1 of the PAF's so they were out of phase, others have said that just turning the 1 PAF put them out of phase. ...
Timbo, you probably figured this out already, but...
Just turning around the pickup does nothing to alter the sound. That's because the pickup magnet's relationship to the slug and screw poles (and therefore, the magnet's relationship to the start & finish of the coil winds) has not changed.
To get the out-of-phase sound of Green's guitar, you have to flip the magnet in the pickup. The long, thin edges are the N/S poles of the magnet. One side is presently facing the screw poles, while the other side is facing the slug pole pieces. You flip the magnet so what was facing the screw pole pieces is now facing the slug pole pieces, and you'll have set up that pickup to be out-of-phase with the other pickup.
Makes no difference for either pickup played singly; you only hear an effect when both are being played.
If you have a pickup which is
not like an old Gibson (which had a single conductor inside a braided shield), then you can just swap hot/ground wires for one pickup in the control cavity. But to do that, you need the pickup to have 2 conductors inside an insulated jacket, or a 4-wire arrangement, or you have to add sleeving over the existing pickup's braided shield (because its Hot with then be on the shield, and grounded by the other pickup's grounded braid).