Now, being a guitarist, but increasingly being turned onto bass, I've had a few through my hands over the years. Been looking for a fretless jazz for a while, and just ended up by chance with a really clean 81 ibanez blazer factory fretless, which I'm chuffed with, except... The neck feels really big, width and depth, compared with the the last jazz "type" bass I had.. More like a p bass I'm told. Is there really that much difference between the two? Also tried dropping the action a bit, and where it's getting comfortable, I'm getting string slap on the board( neck is good, slight relief ) been told shimming to alter neck angle may help? Before I trade it for a jazz or something slimmer necked( open to ideas) I'm gonna persevere with it, cos it's really nice, and sounds fantastic .. Any ideas or advice appreciated , cheers , razor.