A couple of weeks ago, I mixed my first batch of FX37, albeit with the wrong amount of Benzotriazole; 50 instead of 5ml (from an incorrectly published formula). The medium format TMX looks OK. I haven't printed them yet though. On the other hand, 35mm TMY is definitely grainier than ID11 (1+1). I made comparison prints and decided I definitely prefer the look from ID11.