A lot of people think the String Warranty Void thing was a myth, but that's exactly the speech delivered to me by the salesman when I bought my Ric 4001 in 1978 ($450 + HSC!) at EU Wurlitzer Boston.... as he was ringing up the set set of Roto Swing 66 Stainless he cheerfully recommended. It was never about the string tension, my 4001 came strung with Flats, which are typically HIGHER tension than rounds. It was about the soft fretwire they were using in those days, and flat fret tops. Stainless rounds ATE my frets in about three years. They file the fret tops flat instead of crowned to a typical half-dome shape because otherwise they'd cut into the little "ramp" meniscus of laquer that walks up the side sides of the frets while filing them down. These days they still file them flat, but they use standard nickel-silver frets now, so it's not really an issue but..... use Nickel Rounds. And yeah, the "warranty" is effectively worthless, but send it in anyway, immediately, in case something catastrophic like a broken trussrod happens. If you bought it from a reputable Ric dealer like
Sweetwater, Wildwood, or even GC, you have some warranty or return protection. There's really no excuse for Ric's lame warranty at this price range, but... it is what it is. Great Bass/Crap Warranty.