Wow buddy, what a great job! I like that model of cranks that look like a road bike I like the aesthetics, of course I am an enduro rider and as much as I like them I do not serve hehe, crazy days ago the same thing happened to me my bike had a crunch, and it turned out to be the chain, now if you still have problem you can measure the wear of the chain, another thing is to change the cup that also causes that annoying noise, I usually recommend changing the chain when you change a component of the transmission.
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Thanks. It was a really fun job to do. I was thinking to change the chain, maybe I take a look at it next time.
I agree, normally a worn chain, damages the rest of the transmission, it is best to also replace it. (It is almost the cheapest component on the transmission, but causes damage to the more expensive parts.)