Never mix front and rear tooling in Mach....Rear uses work offset G55.
Also note that the table axis offsets are in radii values irrelevant of the mode you will be operating.
Just some additional comments on lathe geometry outside of the Mach enviroment.
Most CNC programs require additional information for the tooling via a drawing of the tool or providing additional info to avoid gouging when
generating the toolpaths. The programs are similar but different.
Tip orientation is required in Mach3 when using compensation ( not for this dude as manual coding is not done).But the direction can be used to help populate another table for later use if so desired.
Turret orientation and associated angle in degrees.
Tip compensation depending on how touched off tip center or precompenstaed code based on cutting edge.Then you need to cover basic inserts types along with tolerance diameter, etc. Manual sharpened tooling needs to be measured.
Major "to do" in populating the table are x and z offsets, but depending on how touched off / probed, require an easy way to just modify the offsets for drills, reamers, etc.
Thoughts for later on .....,
RICH