Manifold slits?

[PodunkPorter]

Ok so I just finished up my cpvc manifold, I used a hacksaw and made some really nice thin slits, it looks to me like it made better ones than a dremel or other tools. Anyway, so I made an octagon for my 5 gal igloo, it has 2 cross section tubes and a tee in the middle where the wort is draw from. So the posts I've see show no slits in the cross section tubes, only in the outer ones. Is there a reason for this? It seems to me like the more slits the better, but I wanted to ask before I went and cut more

 

[PodunkPorter]

Here's the pics

 

[PodunkPorter]

#2

 

[AkTom]

Looks you already have plenty. More than I would have cut. I'd have cut on the bottom side just cause that's the way mine was made. Im sure it'll work nicely for you.