How complex would this DIY Swiss style lathe conversion be to set up hal/ini?

Going to try and explain the project in a way that y'all can imagine as I feel like it should not be too difficult to program in linuxcnc but I wanted to hear the community's inputs

project: Regular Taig CNC lathe with the 5c headstock. I have already converted the 5c headstock to a guide-bushing-esque headstock. My plan is simple: add a second linear "Z axis" that holds a servo that spins the stock and can also move forward and back to feed the stock through the guide bushing headstock. This guide bushing 5c headstock is thus unpowered.

My thought: Could I just have this new axis be the official Z axis, and have the native tag Z axis be another regular linear axis where it simply acts as one of the offset parameters when setting tool offsets? So the only movement the regular taig Z axis would do is move when switching to a different tool such as drills or boring bars of various lengths, while the newly added Z axis behind the headstock acts as the primary Z axis.

I have all of the build details down so I don't think that will be a problem, but I want to know if you guys suspect it will be hard to code in linuxcnc. I do have experience setting up regular lathes & 3/4 axis cnc machines.