The F/FP45 is a beautiful carbody that is very unique and in my opinion deserves to updated premier line attention as other's have mentioned,with fixed pilots, improved body details, full scale fuel tanks, and the correct passenger style pilot plow.
Since MTH has only made the FP45, maybe they could introduce and F45 in the premier line with the current level of detail offered on recent releases. I don't think it will happen though, since they're about to release another run of the FP's in railking again.
I never liked the F/FP45's until I started seeing them in the Dallas area in the middle 90's. I fell in love with cab #97 at the museum at Fair Park and l'm glad that several other's have been preserved.
The F/FP45's are a standout body style that needs some O scale love.
Nice Job Rich on your FP45!