Where can I edit unit collision?

[KomradeKaiser]

Hi, I know how to make the units more compact and the men stand closer together, but the problem is when they run, they start shifting around because each man has his own space around himself. I downloaded a mod on the workshop that eliminates this, so I know it can be done, but I'm wondering where can I edit this? It'll also make moving two units through each other easier and the fighting should be more vicious. (http://i.imgur.com/zTMZw5u.jpg) Here's an image of fighting that the mod should look like.

[Commissar Caligula_]

I'm pretty sure its in battle_entities_table and its the radius, shape and radii_ratio columns. I've got no idea what radii_ratio does but meh. It seems broken in PFM since ships are smaller than birds, so edit it in the Assembly Kit.
Good luck.