Thanks Roger and Peter.
You can see more on the website https://teifiharps.com/harp-sound/
I make the harps on 3 cnc machines: a 9 axis Maier ML26 swiss lathe, three axis Bridgeport V1000/22, and a 5 axis Morbidelli router. I make over 320 parts for each harp - with 34-36 strings the numbers soon add up. Tuning pins are 303 stainless or Ti6Al4V G5 titanium, bridge pins and soundboard eyelets are CZ121 brass or 303 Stainless, ally parts are 6061, black plastic parts are Delrin, low-friction surfaces PTFE. Necks and columns are Walnut, Ash, Cherry or Beech in hardwood or Beech ply on student harps. Soundboxes are a composite.
We sub-contract the anodizing and buy in strings, O rings, screws and hardened pins. Everything else is in-house, the swiss lathe is very productive - it has a bar feeder so I load it up and leave it running overnight on brass and stainless jobs, titanium is too unpredictable to leave unattended - the lathe doesn't have a tool breakage sensor and it would be far too easy to turn ten bars of Ti into swarf and scrap. The Morbidelli is a beast, 15hp spindle, HSK63 tooling, but repeatable to 0.02mm and has a 3.2 metre bed. Italian temperament. Bridgeport is ordinary but the most reliable.
This year I'm designing a new model made from composite materials, so have been watching PeteEng's posts with interest.