I would to install a hat over the fan shim (
PIM461), reading https://www.tomshardware.com/reviews/pimoroni-fan-shim-heatsink-raspberry-pi-4,6219.html would suggest I will need to raise the hat for clearance so the booster header looks like the way to go here. The hat I want to put on is going to be load bearing to an extent so will need standoff support on the other (non header connecting) side.
Can anyone advise what side standoffs I should get to go with the Booster header? Many thanks.