...but have a little bit more tension???
I've tried TI flats on my 4001. I've given myself several months with them in hopes I'd eventually get used to them. I *LOVE LOVE LOVE* the way they sound on this bass, but I feel like I'm fighting these strings every time I play it. I want to go for the 4001 more often because it has such killer tone (especially with TIs), but my AVRI '63 P strung up with Fender 9050L flats gets the gigs. The 4001 is like a muscle car, the P is like driving a school bus. The school bus gets me from point A to point B safely. ;-)
I do like a lower tension flat, but the TIs are too extreme for me. The 9050L set feels much lower tension than the LaBella 760FL strings I used for a long time, and I consider that a good thing. I remember liking the .045-.100 Chromes I had on a 4003 several years ago.
I'd love to find a flatwound that's closer to that amazing TI sound. I suspect this isn't a thing that exists, but maybe you all can enlighten me. Any suggestions?