@ Tullio: Thanks, good find! I'll use that.
If you requisition something, how long can you keep it before you have to give it back? If your Psyker is Primaris-calibur, and you acquire a Force Sword for him/her, when must they lose it back to the general pool?
Must all of your players be Cadian/Catachan/what have you? How do you convince all your players who know what we're talking about to pick one regiment origin, when it is very easy to imagine that, in the meat grinder, Cadians, Elysians, and Death Korps COULD be lumped together, after casualities, if a specific mission could benefit from a blend of their varied skills?
What is the real use for Sergeants? Much of their buffing abilities focus on Comrades, rather than other PCs, as I see it, beyond Inspiring.
Re: Regiments and their make up: The preferred method is for everyone from the squad to be from the same regiment, but it is not required Hammer of the Emperor kind of addresses this with it's Mixed Regiment section. A single regiment is accomplished through discussion with the players. As for how? Depends on your group and the GM in question.
Re: Sergeant. The sergeant's orders buff comrades, but by buffing the comrades, they're better able to help the players. Take for instance the "Get them!" order. Whenever a comrade aids in a ranged volley/close quarters action, they normally add +5 to their attached player's bs/ws. When "Get Them!" is active, you recieve and additonal bonus of +4 damage. The "take cover" order allows the comrades to give their attached player +10 to an evasion test. Both of which are pretty great, but require some thinking to use. They're also not bad tanks in close combat and have pretty good access to social skills (despite not having the social aptitude).
Re: Gear requisition.
Pg 161 under "Logistics" provides some guidance on this issue:
"Once equipment gear has been issued, soldiers are fully responsible for maintaining it andreturning it, when requested, in fully operational condidition."
"If the gear is assigned through official channels to a unit, then that group must assume full responsibility for it. However, if the goods are delievered without a paper trail, then the characters might be able to exploit it for their own purposes."
"Sometimes, characters may choose to work the system, but other times an unexpected piece of equipment may reach them….In either case, their bounty might be used for their own purposes…"
As far as i know, it depends on how the gear is acquired. If acquired through spoils/looting on the battlefield, the gear doesn't go back to the pool. If acquired through Mission Assignment, then this goes back to the pool. However, the Random Assignment gear is for the party to keep. The same applies for gear gained by "working the system" either via a commerce test to gain the logistics bonus, or through the way a character describes getting the gear.
It boils down to it being up to the GM about whether or not the gear requisitioned from a legitmate logistics tests( one made by simply requesting it from the pool), outside of mission assignment gear, is returned to the pool and when.