If you take the Spec-Ops field upgrade then the motion sensors and T-UGS have bigger range too
I'm a great fan of the explosive perk for engi and medic. Those extra explosives come in really handy.
![Big Grin :D :D](/styles/default/xenforo/vbSmilies/Normal/biggrin.gif)
Tugs or Motion balls dude, think the balls only last a few mins (lolz) but the Tugs lasts until someone shoots it.
Stick it behind a wall or above a bottle neck as I believe they work through the walls/floor.
Ah didn't realise it worked through a wall!