I made a custom case for my concertina and left a little extra room in the end for an audio recorder, etc.
I need to place the blocks in the case next and I'm not sure how far apart to space them.
In its natural resting state, the instrument is 5-3/4" long.
With a little pressure it compresses to 5-1/2"
With a strong press it is 5-1/4" long
How far apart should the blocks be?
What is the reason for storing a concertina in the compressed state?
Is it harmful to compress a concertina "too" tightly?