Once again, IIRC is not a person, it is an abbreviation for If (I), I (I), Recall ®, Correctly ©. IF I Recall Correctly (IIRC).
Have you considered using SubPirates as another source? Lotsa detail oriented folk there as well. Merriman has his own section over there, highly educational.
Since you've technically announced the project, you should consider starting a build thread. Planning stage is a great place to start. How you will be making the hull, propulsion and ballast system plans, other functionality (assuming you will be incorporating working scopes, torps and possibly a towed array as well...). Bounce your ideas off those who may have "been there and done that". I would love to see this project kick off!