So I've been pondering asking this question in the Rules question section, but I figured I'd ask it here first to see if I'm insane, or if I'm missing something.
So unless I'm missing something, ATOW at no point mentions changing your character's Field Aptitude from the Field Aptitude: Clan Fighter Pilot to that of the Clan ProtoMech Warrior one.
And while this makes sense for the ProtoMech Pilot Training where you wash out of Aerospace training and take Proto training next, it doesn't make as much sense if you start the ProtoMech training as part of the early Trueborn Creche path.
It especially doesn't make sense when the training is much better in 3145, when training has been worked out, and the character should get the bonus. (For instance on page 189 of Era Report: 3145the TankWarrior subcaste allows that character to switch their Field Aptitude.)
And the last little question. That same page mentions that only the Horse and the Ravens had ProtoMechs, and thus only those two clans "may choose the ProtoMech warrior sub-caste, ProtoMech Life Modules, or ProtoMech training."
Do you think they should be able to use the advanced ProtoMech training, which in ATOW was only available to the Blood Spirits?