Yeah, Kubicki necks are actually better than most Fender Custom Shop builds...because Phil WAS the "Fender Custom Shop" in the 60s-70s, before he left to build his own licensed Fender parts in the late 70s-early 80s. I've seen some of his Fender necks alone go for as high as $600 used.
Only after this did he start doing his headless bass stuff....then licensed Fender to build them for him for a couple of years. But Fender cut corners, dropping the quality and Phil took back the line to build them right again.
Pre and post Fender Kubicki stuff is amazing quality. I have a number of rare Kubickis....Stu Hamm's and Neil Stubenhaus' personal axes among them.
The Fender clone parts are AAA+....BTW Kubicki also built a lot of OEM for the other brands that "built" Fender licensed parts early on...and they slapped their brands on them! A number of custom builders also used his custom order parts and them slapped their names on them as well.
For Uwe....Kubicki also made some Gibson headstock necks, although I have only seen 6-string guitar ones that bolt on and the truss rod adjust is at the heel. They were for someone building dobro/metal guitars. Pretty rare.
The only other Gibson type Kubikcis I've seen are his mini Les Paul and Flying V travel guitars.