I have a '93 4003S/8 that I've had for a year now with no neck issues. I've actually loosened the truss rods. This thing has the thickest fingerboard I've ever seen, but the overall neck thickness is pretty much the same as my '89 4003S.
And speaking of neck thickness, at some point in the late 90's, Ric got a new CNC router. This is when the neck shapes got weird (thick). They are now back to a slim profile.
Flats on a Ric = very cool! I had a V63 for a while that I strung up with some TI flats. Awesome Wings vibe.
They are much prettier in real life, especially the Fireglo! That thing's a gem. The black one is my #1, followed closely by my '94 Les Paul Special. The cream one rarely leaves the house. VERY rarely.....