Trigger bracket for Form 3 build platform

Problem

• Formlabs Form 3 build platforms must trigger a button for the printer to determine presence
• same build platforms use brittle plastic shell to trigger said button
• breaking the shell necessitates a different way to trigger the button
• we tried taping temporary fixes in place, but they'd fall off after a bit & that was risky given the resin tank immediately below

Hardware required

• M3 screw
• M3 hex nut