[BiglyCommentary]

I put together a jumbo sized Creality type printer for a friend with a 300mm x

That sounds like a CR10-S. A "jumbo" would be something like their CR10-S5, 500mm.

Even though our bedroom is two stories above the room where the printer is kept she still whines about it when I have a long project printing through the night.

Replace the stock Creality controller with a board that can run TMC2209 stepper motor drive modules running in stealth-chop mode and the noise level from the steppers will drop dramatically. You won't be able to hear the printer from the next room.

[fireman15]

Sorry, I am sure you are correct... I did not realize that Creality used the term jumbo in their product descriptions. His was the largest available when he bought it and I am not completely sure of the build size measurements or the model umber at this point. It has been a while. He purchased it to make molds for casting boat parts in aluminum and resin. It was jumbo compared to our printer.

Even though we got conscientious support from the supplier we purchased it from through emails from China it was quite an ordeal adding the “self-leveling” sensor. Of course, my friend didn't realize that he would still have to level the huge bed... just not as often. He thought the operation was going to be completely automated. I tried to explain that no piece of glass was that size was going to be completely flat and that we needed the sensor to make up for the imperfections if he wanted good adhesion.