actually
based on a PM convo I had with Saint when customs first came out
it’s the opposite,
adding it could slow it down if it’s already in the core,and could increase any recon on it.
but make more it more pronounced/effective when it hits.
Although it seems in some cases people process the modules faster than the cores-in which case it could be faster, then when the core processes-slower, and then more pronounced in the end