I wasn’t that surprised about the P2 because I’ve got a vague feeling that I heard he used to offer them as an option at some point. But I’m usually wrong, or so I’m told. I agree though that I can't imagine him using the 1000g+ type of P2, as it has no business being fitted to that frame. Even the 800g variety would be having ideas a bit above its station.
I must admit I hadn’t thought of the canti guide being removed. If so, hopefully the culprit was struck by lightning soon afterwards and burned to a small pile of ash.
The trouble is, if the fork isn’t original and there could have been a canti bridge, you presumably don’t know the geometry for sure yet? I must say it’s very surprising if CdeK can’t tell you the age from the frame number!