All build and development chat is hosted on the GMSN! Slack Site.
Each module has it's own channel, something like #build-purevco, which has all the relevant info the builders might need, including videos and corrections to BoMs and such.
You can also ask questions that usually get answered via videos or links to useful info.
All of the Through Hole build docs are also available there.
Come and join the chat!
Follow the link for access: GMSN! Synth Design Slack