Heavy Yak Cannon ??!?! absolutely horrible idea ! A Yak Cannon is so arc-limited.
I would MUCH rather have a Yak turret, so I can happily Yak all over the place.
Ahh so you want the Quad Teat Turret with milk ammo. The extra humiliation from being squirted with a warm, creamy white liquid can prompt some serious nerdrage and/or pink eye for your enemies once they get themselves cleaned up