i put medium corelli strings on my bass and they sound great arco and ok pizz. they're old now and alittle beat up from taking them on and off basses, so i'm thinking of getting a new set. i have the mediums. i feel that they bow extremely well and are a dream on the left hand. the thin diameter doesnt bother me, i actually like it. i think the g string may sound alittle thin pizz though. i'm thinking of going to the next gauge, the forte. i still want low tension and a good bowability and nice pizz tone and thinner diameter than say a weich. can anyone comment on how the forte's will compare to the mediums?