[HELP] Possible Lathe Threads

[EdK]

I know most lathes are capable of cutting more threads than the manufacturers claim. I'd like to figure out every possible thread my lathe can cut. My lathe has kind of a strange gear configuration in that it seems to have more gears than other lathes. I've seen people create spreadsheets that will do the calculations but I haven't been able to figure out how to do that. Anybody ever created such a spreadsheet? Below is an image of the gear train of my lathe. The drawing shows the gears set up for 8TPI.

Lead screw TPI is 8.

Ed