For the winter I took the guts off my kay and am trying different non-gut string combinations. One that I stumbled upon but which makes perfect sense is Obligato on G and D, and Pirastro flat-chromesteel (not Original) on the bottom. This combo works great. The two different strings match perfectly in volume and feel and finish since they are by the same maker. The FCS low strings don't have the Obligato rolling problem and are more spiro-like for pizz but still bow easily. This combo is cheap too! I would recomend it for anybody who likes a more gut like pizz tone but needs sustain and some growl on the lower strings, and does alot of arco too. Has anybody else tried this combo? -Jon P.S. The ideal string height on my bass is 5/16 on the G for this set-up.