Great project! I made mine replacing the bc547 and bc557 by 2n3904 and 2n3906 and I did only have 0.1uf (104) capacitor for use with the 28 pins socket. It’s ok to do that?
Also witch software you used to create the 3d model of the board?
https://www.dropbox.com/sh/mxwwzmb6swukdke/AAA-dOAkcjrLk9J8oGUcju08a?dl=0
