Yes, in that case we have been in production since last year and have crossed over a hundred units in the production mark. It's not a lot but, this is passion not a business.
In terms of refinement, refinement to minor fixes have been done. As @JoaMat had pointed out last year regarding the connections, now it is a fully soldered connection from the earlier screw down one. This solved majority of the issues we had in the early units.
Then upon Spritzer and Wachara's recommendations since last year, the drivers have 2-stage dust protection and go through vigorous anechoic chamber testing to detect noise/buzz/squeal. We have positively eliminated that as well.
Lastly, the overall assembly and Manufacturing has also been refined now that we have been in production since last year.
The RR1 is here to stay, it will not be updated as "2.0" or a "2nd Gen" as other Manufacturers do. There will be future products coming out but, that's another story as we are currently busy with other non-headphone related projects as well.