Hey Optera,

Thanks for the response - yes I understand what you are saying, I had misunderstood how the deciders work vs the arithmetic combinators.

For anyone else finding and reading this who appears to be having the same problem, it goes like this:

Arithmetic Combinators will taken an input ...

I did a search and had a good read, but couldn't see anyone else having reported this issue - so not sure if it's just me. If so, apologies in advance!

The simplest form of the issue is this: an isolated network of items (piercing rounds, in this case) has a decider combinator connected with both ...