SGII special troops

First off, thanks to everyone who helped me out with my query on SGII
tactics.  Your advice made a lot of sense.

I may soon be getting a *bunch* of OOP figs in a trade, and I know that
certain types of troops in SGII are not represented by models in the
line of figs to which the figs in the trade belong.  So, I'll probably
do a bunch of conversions.  The question is, what conversions?

As far as I can tell, these are the special unpowered infantry troop
types, the rough number that I think ought to be present in a given
force, and where they ought to be located, organizationally.  Please
tell me if you disagree, and why - this is just a rough guess at this
point.

Sniper - one per platoon at most.  Independant unit?  Detached element?
EW - one per platoon at most, in the command squad, plus one in the
company command squad.
Heavy Weapons (IAVR, GMS/P, etc) - one per squad (a total of one, not
one of each kind).
Support Weapon (SAW) - one per squad.
Medic - one per platoon at most.  In command squad?  Another in the
company command squad?
Drone team - one per platoon at most.  Independant unit?
Crew-served weapons - one per platoon at most.	Independant unit.

What'd I miss?

Thanks!