+1Some one correct me if i am wrong but i wouldnt put flats on that bass.There is alot more tension with flats than most all other strings.What kind of shape is this bass in has it been played these last 20 years or sitting in a closet?If its been in a closit has it been under tension?I suggested nylons because they are lower tension than most.If it were me i take it and have it checked out and set up by a pro just hate to see some one drop 60 buck on flats to find the neck rod is shot!