Wow Phanjam, nice work, may I recommend something? Specially for the female chest, a retexture of a vanilla chest looks better than using the edited original mesh. I found an even faster way to do it, let me explain it.
You choose the vanilla model of choice (if the skeleton doesn't work like happened to you with the engi set, just copy the Hum_m skeleton and change its name to overwrite the broken skeleton before importing)
Make a duplicate of the chest you're going to use. (move it around so it's not overlapped with the original)
Assing the original texture to the duplicate chest, and now the work starts, you have to edit the UV map of the duplicate chest so the original texture looks good on it.
Once you finish with the UV mapping, you overlap the chest models, and bake the texture of the duplicate over the original (this can take a bit time to get used to, but there are good tutorials around). Now you have the original texture fitting the vanilla UV map.
The details that are special to an armor, you can separate them from the original mesh an add them as ExChest.
Also, I was thinkin we should rework the skirt and tassets of the original armors using a mix and match of vanilla ones, since those give a lot of character to a chest piece, and the TL1 have almost the same form in every armor.
I'm sorry if I come a bit hard on your work, but if I don't say anything and tweak a lot your work that may be taken like I don't apreaciate your work enough (wich I really apreciate, like the work of
@Kva3imoda and
@Vkoslak ), also aiming higher in quality will make you improve faster.

Take like the advice of an editor of sorts (the good editors

)
Please tell me what you think, and again great work on your blender journey