Mod Tinkerer
Source
Core Rulebook pg. 71
You can spend 24 hours of uninterrupted work to exchange all your drone or exocortex mods at any time, even if you haven’t gained a level. Any other drone features (such as its chassis or bonus feats) can still be exchanged only when you gain a level.
Dragonscript
ID
4f5a7c849eaa3f3f66197205