So, a bit of work later, and CNC Doctor has been improved:
* Own subdomain
* Endmill diameter can now be specified in tenths of a millimetre, instead of just whole millimetres
* I ran a bit of janky linear regression on the Mekanika.io numbers to get slightly more accurate calculations for feeds
* Fixed a layout bug that would cause overflow on phone screens
* Fixed a service worker bug that broke everything on Chrome
Check it out at its new home: https://cnc-doctor.retro-freedom.nz