1. No, they still have the basic hitboxes as far as im concerned.
2. Ramie, klata, helm and kap change as the team color changes.
Reka, biodro, udo and noga change as the player colors are defined.
The rest looks like it is made.
3. There is somewhere Espadons tutorial on how to mod with guideline for gosteks.
For any other help, i recommend you ask scout, as he is one of the best gostek modders around here.