If I understand this thread correctly, the required database amendments are:
First, go over the USN sub classes, and make sure they
(a) are using device #1646 (Mk 10) to start with, not the old version of the device, in weapon slot #9;
(b) and at an appropriately dated upgrade, (LST's 4204 sounds good) upgrade to device #1647 in that weapon slot;
(c) check subsequent upgrades as necessary; and
(d) adjust the availability date of the Mk 12 device #1647 appropriately.
Second, add a device being the Mk 11 used by the Argonaut, for its unique use, with a pool for some refills. The Allied player can then defer the upgrade to SST configuration until the stock of mines has been depleted, should s/he be so minded.
Items to be determined:
(a) how many Mk 11s were available?
(b) did they make any more? (Probably not, one infers.)
(c) when was Argonaut's mine gear landed?
The answer to item (c) was easy to find - Conway's has it re-designated "APS1" before the Makin raid in August 1942. DANFS entry is:
On 22 January 1942, she returned to Pearl Harbor and, after a brief stop there, proceeded to the Mare Island Navy Yard for conversion to a troop transport submarine.
Argonaut returned to action in the South Pacific in August... designation was changed to APS-1 on 22 September,...
So the initial upgrade might be available in February 42, although the current 21 day period might need to be extended.
"You may find that having is not so nearly pleasing a thing as wanting. It is not logical, but it is often true."
- Cdr Spock