Once I've a second bass, I'm going to replace the D'addario XL Nickels on my TRBX604 with XL Chromes. Originally it came with 45-65-80-100 (EXL170) but I wanted a bit more tension in the E and A strings, so changed to 45-65-85-105 (EXL165), and have been very happy with the feel of them. I'll be putting a set of them on the new bass when it comes. When I change to the Chromes, I don't want to lose any of that sense of tension/stiffness. I think I understand right that the nature of the flats themselves will give some of that feel for me. D'addario don't do a 45-65-85-105 set of Chromes so I need to make a choice. My instinct is to go with 50-70-85-105 (ECB82) but if I'm going to find that they feel significantly different to the tension+stiffness of the Nickels, perhaps I should be warned and shepherded towards 45-65-80-100 (ECB81) I play only with finger picking, with a soft touch, aiming to get a rounded attack. I play using all four strings equally, but almost never get above the 12th fret, and never play chords. I'll be having the flats fitted by my local tech to be sure of the set up being correct.