I have played stradella for a number of years but have wanted to learn free bass which seems so much more logical. I had a used palmer convertertor which i took into the shop and I am very gullible and they convinced me the instrument is no good,that it is a discontinued model that one can not go very far with. The problem is that it had a full piano keyboard and 128 bass which i liked. They convinced me to buy, perhaps idiotically an inexpensive Bassetti which is entirely free bass. The instrument looks nice but it only has three rows of buttons and maybe a bit more than two octaves on the piano side. I am used to playing 128 bass,even though I've never used so many buttons and a full piano accorduon,so I'm realy worried that the layout of this instrument will be too small. I have never understood how band musicians play melodies with only two rows of buttons and barely more than three octaves of piano. I looked at a dealer on line and they sell converter style for one thousand dollars cheaper than just free bass alone. But isn't the concverter system more advantageous to play?