Thinnest J necks?
yes - 66 jazz can be really thin, as can early 70’s jazz necks…
for a more reasonable option, I don’t think I’ve ever felt a thinner neck than the first production MIJ Geddy Lee jazz bass (“Limited Edition” neck plate). Definitely the thinnest I’ve ever played, with all the grindy tone of an early 70’s jazz bass.
yes - 66 jazz can be really thin, as can early 70’s jazz necks…
for a more reasonable option, I don’t think I’ve ever felt a thinner neck than the first production MIJ Geddy Lee jazz bass (“Limited Edition” neck plate). Definitely the thinnest I’ve ever played, with all the grindy tone of an early 70’s jazz bass.