[Phantasm]

Mechanic is one skill that I usually just say, "pick a specialty or two, or raise it to an IQ/H skill that covers all specialties except microtechnology and nanotechnology"; those two specializations, for various reasons, are I find a bit too specialized to be rolled into a more generic "one grade higher" skill.

(The basis for this is actually a reverse engineering of the optional specialization rules taken in the opposite direction.)

There's a lot of potential overlap with Mechanic specialties. Sometimes the trick is finding the right combination; other times you want to house-rule something slightly broader.

Just my G$0.02 ($0.10USD) worth.