Today I use TI Powerbass rounds (107) and Pyramid Gold Flats (105) all long scale. I wanted to see if I could interchange without invoking a truss-rod adjustment, but it looks like the tensions are different enough that isn't gonna happen. 1 - I wanted to confirm the measurements I found: Pyramid Nickel Flat Bass Lg-Sc = 164.9 pounds Source: http://www.pyramid-saiten.de/catalogue/katalog_12_eng.pdf Page 29 string set 640/1 TI Powerbass = 183.62 pounds Source: http://www.thestringguy.com/tension.html 2 - Looking for suggestions on alternative strings to give me a better match. Maybe Fender flats?, or a different set of rounds. I want minimal fret noise and strong fundamentals. Thanks for all suggestions.