Simply modify the colision/placement box of the modular turrets to be 2 by 2 instead of 3 by 3. Require Modular Turrets from wodzu93.
Small changes concerning balance, gameplay, or graphics.
1.0.3 - 2.1 port 1.0.2 - disable the rotation of turrets (rotating placed turrets causing the turret to not return to their original rotation after aiming target on the edge of their firing arc.) 1.0.1 - adding dependencies in info.json