My only problem intonating the P5 - with Chromes - is that the B-string saddle sits so far back that the extra windings at the end of the string sit on top of the saddle. It still sounds good, but I don't think it's optimal and I'm thinking of getting a Fender Hi Mass bridge just for that. Looks like with those the ball ends get anchored further back.
E: I'm thinking about the Fender bridge specifically because I'm hoping they are a drop-in replacement and appear to be priced rather attractively.
You could try adding a ferrule or a few washers where the ball end meets the bridge hole. It would take the thicker wraps out of the equation. Apparently Duck Dunn used to do the same thing on the low E to accomodate whatever thick strings he was using.