Robots and Craft Construct

[Sethll7]

Can Robots be upgraded per the rules presented in Building and Modifying Constructs or are they no longer modifiable after being built?

[Slithery D]

The only robot construct rules are in the 5th volume of the Iron Gods AP. You cannot make them with Craft Construct at all, let alone modify them. You need different feats, an appropriate lab that your GM lets you have, and a power source that your GM lets you have.