When METX401 shifted over to BNSF, 407 shifted from BNSF to RI. An idea would be that RI took back an F40PH and gave us an MP36, which we might've been needing more then an F40PH, which has a smaller fuel tank.
Another possabillity is that RI had problems with 407, so they sent it to Milwaukee and we gave up an MP36 to them. This seems unlikely, though, as we need the MP36's more then RI does. But then again we're getting more new cab cars hear, so a third idea is that they're getting ready for SWS expantion.
My guess is that when expanded service does come, we'll be seeing less of the F40PH's on MILW trains; they'll be religating the PH's to NCS, as they don't need the MP36's. Also, I can see RI or BNSF giving up a few more locos to MILW, as you will need replacements for the F40PH's that you now have on NCS trains. The rest of the MP36's will likely go to BNSF, with the F40PH's likely again working SWS jobs (MP36's do not run those trains, eather.) Any extra Winnebagos could possibly go to MILW to run those trains that don't absolutely need MP36's; after all, BNSF has extra Winnies, anyway.
Nobody is right or wrong hear; we'll just have to wate and see what happens. Things could go eather way - but I don't at all think we're done with equipment moving around, I in fact think this is just the start. I'll ask around tomorrow and see what I can find out.