This is a simple and compact way of enabling buildings on tf2 servers.
I used Dragnoz portable torrent sistem to make portable dispenser and sentrys
Dragnoz video link: www.youtube.com/watch?v=s7czfEx6n7g
the sentry shoots in only one direction, depending on which direction you point it at, it has 200 arrows of ammo
the dispenser gives everyone, that belongs to the red team in the 3 block radios, regenaration and 1 arrow/s.

This buildings are very compact so they don't damage the construction, if, anyone cam figure a better way to make a compact clock, please write in the comments.
I also have other, more evoluited version of the sentry and dispenser, and i'll post as soon as i finish them, but they aren't as compact, so im not very happy wth them.