So I'm new to 40k and just starting with Space Marines. I am putting together my first army list but I'm a bit confused. In my codex there is only one type of servitor you can attach to techmarines. However, on the GW website, when looking at the model catalog they list 3 types of servitors- Tech, Gun, and Close Combat, with 3 seperate stat lines and gearing options. I've searched for an errata or update but can't seem to find anything. Where is the information for these different servitor types and their point costs? If anyone can help me out with this, I would greatly appreciate it.