I guess being able to upgrade the teleporters and dispenser, allowing you to unsap both your teleporter entrance and exit by hitting either one with your wrench and using a dispenser to block the doorway to the spiral staircase wasn't enough :P

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http://kotaku.com/5532100/finally-the-team-fortress-2-engineer-update-is-coming-soon

"Here it is, kids. The final major Team Fortress 2 character updates (for now). The last-in-line Engineer is due for his big makeover and Valve has officially upgraded our anticipation to Tier 3 with a new teaser.

In an update to its celebration of 119 Team Fortress 2 updates, Valve has engineered this brief clip that could very well be oozing with hidden details. I suggest watching it frame by frame to see if you can spot clues. For instance, what's that Iron Man-esque helmet thing? What's the deal with that robotic arm blueprint in the background? What *is* our friend the Engineer working on?

Surely we'll know soon, but we'll factor in Valve Time, just in case."

http://www.teamfortress.com/119/comingsoon.html

This totally reminded me of the Law Abiding Citizen thing.

I scanned it but could find no clues at all :(

The blow torch? The hammer? The plans on the wall? The helmet in the foreground mid clip?

meh, I'll still be playing Medic.

Just regular everyday items I would expect an engineer to have in his garage.

I was looking for something more obvious rather than grasp at straws like this.