I've got a 6-string fretless that I want to tune F#-G to match my BTB7 tuned F#-C. I have a set of Kaliums that I can put on it, but I prefer flatwounds on anything fretless. I know Octave4plus makes custom ones, but I've heard a lot of negative press about them and their order form is confusing (I also only need the one extra string; I'd use D'addario Chromes for the others). Is there any other company that makes custom flatwound gauges? Looking to get a .175 or .180 or something like that. I use a .184 for the F# on my BTB. Also wondering if anybody else has had issues with the Brice fretless basses having too high of action? The bridge is clearly designed for a fretted bass because at its lowest point the low B and high C are too high. My first thought is to give it a neck shim, but if anyone knows of a replacement bridge that would allow for lower action I'd prefer that option. The string spacing is 16mm.