A question about Skully and Modules

[Spooky Electric]

Is there a way to know which modules stack and which ones dont??

So, let's say you have two 7-Slot chamber modules. I'm not sure how I grabbed two without noticing, but I did.

Would that stack in any way??

Im not sure how it would, unless when adding it, it's series of crit every 7 shots is out of sync with the first one.

Like the first one is on shot number 4, you added the second one, so now you have two different moments where your shot crits.

So like, here is the firing sequence:
1 - 2 - 3 - 4 - 5 - 6 - (7)
4 - 5 - 6 - (7) - 1 - 2 - 3

I seriously doubt it works this way, and I now I'm wondering if the firing sequence resets moving to a new floor or other special room transitions.

How would I be able to test??
Is there a visual notification of when your normal shot crits, or if your next shot crits??

Im assuming certain modules with the rarer or non-stat changing specialty attributes dont, but I have noticed that some do.

Like, does having two of the napalm ones stack the damage over time or does just the stat boost stack??

Hmmmm......

[DanonZer]

I'm quite late but you can see which modules stack on the Skully (Ship) page on the wiki, although it's likely missing a fair few interactions. As for crits, they make a unique sound when fired.