Not true. Rob has modified the profile of every one of my RAs to date. If you buy "off the shelf" at a store, no, but custom orders? You betcha. On my original Deep 4, he reinforced the neck because I used the bottom four strings of the RS885 set. He also did a special bridge to accommodate higher action on my newer Deep 4, so things like this are not unheard of with him. The neck shaping Rob did on my Deep 4 is just amazing.
I didn't know! I only have this information that since Rob only had to know if I wanted 17.5 mm or 16.5 mm a few week before the bass is completed. Therefore I believe that the neck is same if you do 16.5 mm or 17.5 mm.
Sorry for the mislead
