Thanks for your replies, I have not got the Guerrini now, so may be the problem was that the black keys are slightly thicker , nearly 1mm, they are on the excelsior
Maybe I am being too fussy but it took me 2 years to get used to my 120 bass scandalli, and I would like to be able to swap easily between the accordions, the scandalli weighs 12 kg
I just want a lighter accordion with a keyboard like the scandalli
Each time I try a new accordion it costs me at least £100 on ebay
I am trying to use your collective knowledge to minimise this cost, my wife thinks I am just wasting money
I have a left shoulder problem, rotator cuff, which 3 physiotherapists have failed to fix, so I just ignore the discomfort
Maybe it would be better to go to a 3 voice 120 bass, I would like to get below 9kg
Once again thanks for your suggestions