Replacing all of the metal bellow corners.

[Brassodemolish]

Is it feasible doing this on old bellows? I removed the bellows and shined light from the inside and the gussets look fine and aren't to worn. I was thinking about removing the old bellows tape and corners and replacing. I realize that the metal corners on modern accordions are put on a press before the bellows are glued to the frames, wondering if I can slightly compress them individually before gluing them on then use one of those pliars that are used on Styrian accordions.

 

[Glug]

It's definitely possible, I've done it a few times, but it is quite a lot of work, the accordions in question were middle to late 50s.

There are several different corner sizes, basically you want to match the radius of the corner curve and the length of the arms.
eg. https://www.ebay.co.uk/itm/171483785147?hash=item27ed3ae7bb:g:E0cAAOxyLm9TFmI2

I measure the thickness of the existing corners in place with a digital calipers and then compress the new corners using a parallel pliers to the same thickness. Stopping periodically to hammer the corner into place with a small block of wood.
Pliers: https://www.amazon.co.uk/gp/product/B01401LL7K/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Removing the old tape is best done by wetting it by painting on water and then peeling it off. Putting the new tape on is quite fun but using the proper glue helps a lot.
eg. http://www.cgmmusical.co.uk/CGM_Musical_Services/Bellows_Tape.html#11

Edit: here's my first go at retaping https://www.accordionists.info/threads/bellows-patterns.6124/