Advanced Mods
Source
Core Rulebook pg. 74
You can choose from any of the mods on the advanced mod list whenever your drone gains a new mod (in addition to those from the basic mod list). Your drone must always have at least 5 mods from the basic list before you can add any advanced mods, even if you rebuild your drone after it gains this ability.
Dragonscript
ID
db7555fc1e7105edfa5a76e4