He is a music instructor and a guitar maker in Portland.
The wood that guitar makers love most is Brazilian rosewood, for the bodies of the instruments.
The discussion with the guitar maker turned to the cost for the photographs.
He also shared his expertise and knowledge with younger guitar makers.
There are many Portuguese guitar makers still building guitars according to traditional craftsmanship.
His father was a carpenter and a guitar maker.
The company is one of the largest guitar makers in the world, and produces instruments for many other companies.
Armstrong, who was a gifted musician and guitar maker, wasn't modest about his skills at both.
That there are only maybe four Master-class guitar makers left in the country?
"The minute I have one person working for me, I'm a businessman and not a guitar maker," he says.