CONFIRMED THIS GUIDE WORKS WITH 40W
I finally managed to snag a 40W and used this guide to set it up like a new user. My final G92 ended up being at
G92 X-16.4 Y345.3 Z252
This sets the bed as 0 focus, and aligned with my 10W corners (which is 9mm off the front). So to square to the bed exactly, you’ll be around G92 X-16.4 Y354.3 Z252 so you can use that as a starting point and adjust correctly. 