Prototype Tinkerer
Source
Character Operations Manual pg. 75
You can spend 8 hours of uninterrupted work to rebuild your experimental prototype at any time, even if you haven’t gained a level. You may do this even if it is broken or destroyed, and can even rebuild it from scratch if you have appropriate spare parts or scrap. This allows you to exchange any customizations you have selected. You must have an experimental prototype to learn this trick.
Dragonscript
ID
2a88e8917ae4227a6d236752