Update: I also managed to buy a very similar HR50 to my original HR50 from 1996 (this one I bought last year is a '95), and, after I got the SLO Mk2 I sold my original SLO and my HR25 (new SLO has a master volume that made the HR25 somewhat redundant). So now I have a SLOmk2, Decatone, and HR50.