Best way to shorten hot end assembly by 1mm?

[curious aardvark]

filing the nozzle down would have been the simplest and quickest.
Any pound shop will sell you a file capable of doing the job, if you don't already have some.

And don't be so sure it's NOT a standard nozzle.
I've currently got three totally different sized 'standard' nozzles.
You have to read the descriptions really carefully before ordering, and even then there's no guarentee that a new 'mk8' nozzle will match the old 'mk8' nozzle.
Other 'mk's' are available and all just as likely to be random sized :-)

But other than that - just shave 1mm off the brass thread.

[Titan]

filing the nozzle down would have been the simplest and quickest.

Thanks, that's true, but I wanted a better solution that didn't require shaving 1mm off the end of every nozzle ever installed. Also if the nozzle isn't filed perfectly smooth it has the potential to affect the flow and adhesion of every single print. Lowering the sensor was the best option.