Hello Phil,
Regarding my most recent post on this thread, my suggestion that you assess your musical needs was in no way intended to limit you. It all depends on your musical tastes and aspirations, and the genre of music you intend to play.
I play in Folk Clubs and at a number of Senior Citizens events, including a Dementia Sufferers & Carers group. The tunes I play are often popular songs from the 40's 50's & 60's, together with some traditional folk music for good measure. I own two accordions, but the one I use most is a 72 Bass Chanson. The Chanson has never been confounded by any tune I have attempted to play, and I seriously doubt that it will be stumped by anything I choose to play in the future.
It is not my intention to play extremely complicated musical pieces, so I don't see the point of buying an accordion any bigger than my needs dictate. I don't need a Ferrari to drive to the shops, and I don't need a 120 Bass to play the music I like.
You may aspire to more than this, in which case you should buy a 120 Bass. However, for the purpose of learning, you may advance quicker if you master a smaller instrument before you tackle a big one.
Whatever you decide to do, please keep us informed of your progress. I will be interested to know how you get on with all your repairs.
Kind Regards,
Stephen.