To make sure this stays inclusive,

Meur ras, onen hag oll,      Big thanks, one and all.

Oll an gwella,    All the best

Crowdercref Big fiddler! (or crouther)

In Cornwall 'crowd' started out meaning 'crwth', but by the 17th century had become a generic term for any sort of woody-stringy-bowey-scrapey instrument (viola da gamba, violin, etc)