Extra Arms Customizations

[Hanuman]

http://www.d20pfsrd.com/psionics-unleashed/classes/aegis/astral-suits#TOC-Extra-Arms-Lesser

I'm looking at the Aegis but I'm still a little bit confused.

1pt) Lesser Extra Arms
2pt) Extra Arms
3pt) Greater Extra Arms

So if there were 6 Lesser Extra Arms and then 1 greater extra arms would that mean all the arms are considered greater or just one set?

For a single set of greater extra arms would that need to have 6 points? This seems like a lot so I wanted to make sure.

[holywhippet]

Seems right to me. You pay 1point to attach lesser extra arms, pay 2 more points to make them regular extra arms and 3 points to make them greater extra arms. If you added a 5 more less arms they would just be lesser arms needing to be upgraded the same if so desired.