Ok, I got a mystery in my hands. I have a '70s P-bass and a 2005 Jazz Deluxe (both 34" scale, of course). When I install Thomastik-Infeld flats in the Jazz (the regular way, not through the body), the tension is low, like it is in all other basses I have tried them on. (I have been using TIs for years and they always have low tension.) But, I put them in the '70s P-bass, and the strings are super tight, like if I had switched to a set of Jamerson's LaBellas. What gives? Never experienced this in my life. And yes, both basses are being tuned properly with a tuner to the right pitches. Thanks.