Well, I just released the fourth version (and discontinued the ET-01 version in the same go). It's still called the RSH-03 like the third version, but it has a brand new, completely revised circuit board inside. Apart from being beautifully laid out (I can say this because I didn't do it myself, it's done by my new engineer), it now features a switchable 'C11 mod' option to the blue box circuit. I had so many requests and inquiries for this mod, that I succeeded in convincing the Rowland S. Howard estate to say 'okay', even though the great man himself did not have this option.
The C11 mod in the revised RSH-03 is switchable via a 'dip switch' at the circuit board inside the pedal, so you have to preset it to your preference. The mod makes the effect sound much brighter and less muffled.
All the Reuss pedals are now completely handmade in the European Union.
Here's a picture of the dip switch:
