Contact me via email: felix (at) feldspaten (dot) org
ph03nix on Freenode. I'm having a 24/7 client running, so don't expect me to react although I'm appearing online. Best try during office hours.
Twitter / Mastodon
In case you want to contact me, I'm quite often online on the OE7XCJ (2m) and OE7XBI repeaters (70cm). My callsign is OE7PHX.