Advanced Medi Kits state that they give +20, and can be used even if the user does not have the Skill.

What do you roll?

0+20?

Stat+20, as though you had the skill?

1/2Stat +20, as though it was a Basic Untrained skill?

if you don't have the skill then it's half Intelligence + 20. If you do have medicae at trained then it's Intelligence +20.

Thanks for the quick reply.
It would be nice if the book explained such things! (e.g. stating "can be used as an Untrained basic Skill")

I'm sure there are many more questions we'll be finding as we prepare for our game! (and during!)