FP1 X axis lead screw same as FP2

Here's the scoop. I have the screw out of an FP1 cleaning it and considering ordering a replacement nut for it, has about .015" play in the assembly. I get to thinking, I have a brand new old stock FP2 screw and nut from probable first generation, for a machine with 400 MM travel. Both have 10 tpi leads so I pull it out and mic the OD of the threaded part, nearly identical within a thousands of an inch, slot width is the same except .005 less on depth, brand new nut screws on to the FP1 screw with no play although it is a little longer over all (about an inch).
My thought process tells me that I can turn and thread all the end (mounting features) to match the location and length on the FP1 screw and have a brand new one for that mill. I do realize that a lot of the features look as though they have been ground from the factory but I don't really know what other processes have been used as far as heat treatment, normalization, etc. although what I am thinking should not affect the accuracy of the screw one iota. My question is does anyone see any serious problem with stress risers or something of that nature created by turning that to fit. I think, if it works I would end up with an X axis screw with as new performance?

PS The bronze nut looks as if it can be reworked to suit the FP1 also.
Dan