Hello!
Took me a minute to track down your thread here.
As far a fit for the flightsuit goes, think fitted but still functional. Large baggy cloths will get caught and slow you down but skin tight canvas will turn you into a scarecrow. Pics will really help to find that perfect spot.
PI vest do not have to have sleeves but most tutorials were written before the new stuff came out so it's all mostly targeted toward Modern. That said you can just leave the cap sleeves off if you want. You don't have to do PI sleeveless, that choice is entirely yours.
As far as purchased patterns go, I like Sionnach Studies Space Merc line. But you can draft your own as well using the duct tape dummy method too. (YouTube has bunch of tutorials for that kind of thing)
Mando Builder, while we all use it and recommend it, was made by an individual who was kind enough to share it with us all. Most likely if you haven't found the item on there its a custom piece. Lots of us make custom stuff that no one else has and it would be impossible to try and add all those things in there.
Lady Mando stuff is what we do here.
