For technical questions and issues related to this site, the best way to contact me is by using GitHub issues.
For discussions I prefer public forums. I am usually present on Pimax forum as @risa2000. From time to time, under the same nickname, I am also visiting reddit, so if you decide to start a thread about anything from here there, you can summon me as well.
For private inquiries, you can contact me at risa2000x at gmail.