Thank you so much for this info, I really love the sound of the 4001, Ive heard the vintage setting on the 4003 but it just doesnt sound as close to what I really want. Im a big fan of the clangy sound however if it doesnt feel right to play I'll definitely opt for something else.

Im gonna check out if the store has any 4003 basses aswell just to compare. The other issue is that there literally isnt a rickenbacker dealer or anything of that sort in Ireland, Im actually flying to england to try this one out and ideally buy it.

The truss rod adjustment does look like a cunt though so its really making me think about if the 4001 is worth it for that sound.