Bending/fitting the ribs
Providing a simple way to bend the sides that was low risk was a priority for this project,  I have a guitar bending iron myself but adapted a boiling water bath from an Irving Sloane book using a wide necked glass bottle.   Please be aware that temperature differences with this method can cause the glass to crack,  try pre-heating the glass in warm water first and always do this at room temperature.

CAUTION

I do use kerfed linings on my Tenor Ukuleles, but in this instrument I prefer the violin ones, to me they look cleaner at this scale than kerfing. In the plans I note that either can be used