Stephen, sorry, I forgot to reply to your question on the neck width. It is a custom width built with dimensions I gave Susan, & they got it perfect! It is 1.77 at the nut, 2.5 at the 24th fret & .9 thick at the 7th fret. I love thin narrow necks & like J o e y, do not care for the wide flaring necks. The nut width is the same as my Schector 5 string so I knew I liked that, & the 2.5 is as J o e y pointed out, the Classic Taper offered by Alembic. I played a Rougue at Guitar Rez that had the thin neck I liked so I measured it with my calipers & that is where I got the .9 thickness. So my neck is a combination of 3 different necks & it is perfect!
As for the sandwich recipe, no Purpleheart trees were killed during the building of this bass! LOL! It is 5A Quilted Maple on front & back, next is Vermillion, then Maple pinstripe, then Walnut core. The neck is Maple, Vermillion, Maple pinstripe, extra wide 3/8 Ebony, Maple pinstripe, Vermillion, Maple.