Here is a google spreadsheet with my selection matrix for the 10 concepts I've been creating last week. I marked with green backcolor the concepts used for building prototypes.
docs.google.com/spreadsheets/d/1STJbJhU4PuiQ_TdWZ4VdEh9FiiYKX_wUc5XZqf9dQBk/edit?usp=sharing
Prototype of concept H - Wire LegSpace
Prototype of concept E - Scarf LegSpace
Prototype of concept F - Plastic Legspace (with a removable hook)
Course started!
Hope this will be fun :)