A lot of things Andrej says have been true for me and no doubt many other accordionists. "you pull more but the note doesn't give you more sound" and "you know how you want to play, but the accordion won't obey". Especially the introduction to "spet na vasi" (E) and 2nd part to Golica (Fis) . Same problems on my Fismen and I've played it for over 10 years. Most of all, the problem of not hearing the higher notes as clear as the other notes, like only hearing 3 out of 4 notes in a chord. Annoys me every time. Vsaka čast Marko and thanks for sharing this video.
