Huh, almost a year ago I tinkered about this idea, simple RIAA stage, like "add-on" to "Guinevere". Two stages, direct coupling, two R and two C in between (low driving input impedance in network, and high impedance after it - necessary with this pasive arrangement). Perfect to "drive" 100k pot input of "Guinevere". But, I never actually soldered it together, mostly because I don`t have a good enough instruments to check RIAA accuracy...