I have literally printed hundreds of parts, most of them custom made.

From the top of my head:

• a box to transport extra Framework expansion cards
• custom hooks to attach luminous garlands to a tiled ceiling for my wedding
• custom attachments for various devices and tools
• kitchen and bathroom quality of life improvements
• a structure for my Volca mini-synths
• an ergo mech keyboard
• a 100% self designed F1-inspired sim racing wheel (WIP)
• etc.