Boomer68:
I have a sizable fleet of the P2K GP7/9/18's and will one day get around to getting them RP configured. I know with 100% certainty that I'll need to mill the weight to install a LM, a PBM, and a speaker. It's these locomotives that will force me to invest in the proper milling equipment. At some point in the future I plan to offer core exchanges for milled P2K GP weights.
Jacob