I'm going with "mounting hole diameter 0.91mm" from digikey.co.uk/product-detail/e…-27-10-0/ED5036-ND/158198
The hole size I actually set in the PCB is 0.95mm, to account for a bit of shrinkage of the hole diameter from the copper hole plating, and production tolerances.
You're the first one to try this with these boards, so it'll be interesting to see how this will work.
Wanted: PCBs - Batsugun, Battle Garegga, Battle Bakraid
Other stuff - 19" Monitor/chassis and/or WG K7000 Chassis
Vewlix Shipping Brackets (2x sets of the red ones would be nice)
High End Headphones/Desktop Headphone Amps/DACs as well.
If you have any of these for sale/trade let me know