I have found a website that has an online app called G Wizard the Machinists Calculator you can download and use it free for a month, the Annual price is like 79 US dollars.
I have “tuned” it to my machine and it seems to give decent calculations
I wonder if we asked Inventables nicely, if they could try and get a hobby price like 5-10 US dollars per annum?
79 dollars is just too much money for me
regards Neal