1st - You can use your Knowledge: Engineering or appropriate Craft skill as a Heal check with items and constructs.
4th - You can make a small basematon that functions like Unseen Servant. It takes 10 min to create, and you must have enough scrap to make one. Its clockwork functions last for 1 hour per rank in Knowledge: Engineering, they are considered Tiny constructs, and you can create them and leave dormant until needed. Activating them is a standard action.
7th - As a standard action, you can pinpoint the weakness in an item; if targeting an unattended item, successfully touching the item reduces its hardness or damage reduction (material dependent) by your ranks in Knowledge: Engineering. The same effect can be applied to a construct, but requires a successful touch attack first. You may use this ability as part of a Sunder attempt; if you do so, add your INT modifier to your CMB.
10th - When you build your basematons, they now have a fly speed of 20ft, and you can imbue them with one feat that you would qualify for. You can also build them with an HComm or Sliver™ so that you can remain in contact with them; using military grade Peekers or Dalam Multitool, you can see through any individual unit at any one time. Switching your view to another basematon is a move action.