Those of you with older glass boats might be interested in the refurbishment of a Cal 40 on YouTube:

https://youtu.be/TxHGM1B9aJc

Not the usual, hands on, workshop stuff but more concerned with choice of systems, materials and hardware. Be warned the owner is President of Schaefer Marine so money and equipment are not much of a factor in his choices.
It's a bit wordy in parts but some really interesting stuff like how would you turn a 40 foot boat, with encapsulated ballast, upside down?