Sorry to read you're leaving development for the plugin, it's my most used plugin, since I basically only use calibre to upload ebooks to my Kobo Glo. I actually haven't updated the firmware so I can keep the statistics since they're useful to me.
Anyway, best of luck in future projects
ps: While I've very happy with my Kobo, part of me wishes I had a kindle, mostly because of the integration with Goodreads and the X-Ray (not sure it's the name they use) feature that allows you to search for backstory of characters, etc. The only two reasons I don't switch to Kindle is price tag and not a fan of they being able to delete my ebooks remotely, although since I use mainly sideloaded ebooks I shouldn't have that problem.