Hi Jaakko, I see you made a guitar out of an Ashton box and used a key for the bridge. It must be a cosmic part, as I built an Ashton just last week, and used a large brass key just because it looked great on that box. You have built some great instruments. Keep posting the pics.
I`m having problems with the bridge- resonator part. I understand that the bridge sends vibration to the reso box and the sound from the box comes out the horn. But I think what the box is made from plays an important role in the whole build. Plus just sticking the end of the metal bridge against the metal reso box doesn`t work, there has to be something either on the outside of the box or inside it that helps to produce the sound. Guess it`s back to the drawing board on this build...lol.