I used M3x30mm countersunk bolts for mounting. Slightly shorter screws might work. I used 30mm long screws because that was what I had on hand at the time.
The pedal is a bit top heavy with this and I had to add a tiny deadzone to the brake. If you have a cockpit with any tilt on the pedals the deadzone isn't necessary as I have found out after getting a simlab gt1-evo.
Assembly instructions:
First guide the screws thru the hooks (You could use glue to keep the screws from rotating or use pliers to hold the screws when tightening the nuts),
Place the hooks into place behind the pedal face (it should/will be tight with screws in the hooks)
Guide the shaker plate into place. Put nuts onto the screws and use pliers to hold the screws when tightening the nuts
Remixed from:
https://www.thingiverse.com/thing:4411313
https://www.thingiverse.com/thing:3089816
The author remixed this model.