Since the good engie had replaced a construction wrench with destruction drill, he couldn't help but question his practices. This is the result.

Maximum 300 metal reserve
Cannot Move Buildings
Buildings Take %175 Damage From Sappers (more damage)
Buildings have %125 hitpoints (stronger)

Senties cannot be leveled up past level two
Maximum two sentry guns
Sentries cannot be within 880 units of each other
Sentry Turn speed 85% (slower)

Teleporters are two way
Teleporter recharge 125% (longer time)

Dispenser Metal Reserve 50% (smaller)
Dispenser Metal Regen 200% (faster)
Dispenser HP Regen 150% (faster)
Dispenser Range 125% (further distance)


Maybe some flames on the sides?