I play an AVRI Precision Bass with DR 45-105 flats that have been on the bass for about a year. I bought the bass from another TBer and just swapped out the existing strings with what I like. A setup was not done at the time. A local guitar tech is telling me he can't do a setup without replacing the strings. Is that true? I ask because it seems like a lot of players pride themselves on having the same set of flats for years and years.