Awesome add-on! One tiny thing: The "TAC life support build aid" seems to report times in a 24h format during ship construction, but KSP seems to use the much shorter Kerbin days, which are 6 hours or so (unsure)? I just take the overkill-route now, but when I was just starting out in career mode I tried calculating how much I needed during a mission to limit payload weight, and had Kerbals dying.