Modeled up a quick spacer that is the thickness of the Wham Bam XTR magnet and 1 Flex plate. This seems to be completely optional for this printer, but offers piece of mind that if you build plate was gonna smash into your screen it wasn't due to the added thickness of the flex plate.
You will need 2 x m3 8mm bolts to replace the stock bolts.
Modeled in onshape if you want to adjust it: https://cad.onshape.com/documents/0bdccee1ead95326b2dcbf70/w/67b78b5152d63de6ef746106/e/20ad0b5e287f8e193fa8c896?
The author hasn't provided the model origin yet.