@Al Krow to roughly quote you and say I hate sounding like a broken record - (and no I don’t expect my posts to be doted upon) but I have said and others have said multiple times I am pretty sure there is no upcharge for Sandberg in house be they old of Black labels - there is an upcharge for Haüssel’s.
Get your bass configured, copy paste the identifier generated - email Sandberg - and make any tweaks and and you get your answer, or to confirm if there is an upcharge, just email them.
It’s pretty simple to get an answer, then most of the debate falls away