I do not know how they are doing the newest machines off the factory floor, but turning the set-up key always allows me to run the spindle with the doors open up to 750 RPM. It can be a bit finicky on our NGC machines built in 2018, but still seems to always work. One thing you can do is punch in 750 and then hold the FWD key. If the spindle turns with the FWD key depressed, it should be able to spin with the door open if you get the right key position or parameter set. One thing to caution you on is if you decide to override the door interlock switches, make sure you can do it in a way that can easily be reversed. Haas mandates that a tech inspects the door interlock anytime you call them out to do service, but I don't think any of ours have been checked whenever we have a tech out. If you have a newer machine with proximity switches, the magnet method is probably the easiest way to bypass the door interlock.