Is anyone familiar with this SLO preamp project? https://andyszeugs.wordpress.com/high-gain-guitar-preamp-slo/ Apparently there's been a kit available at MusikDing since 2008 but I can't really find much in terms of user reviews. Sounds pretty cool though. Apparently it's the SLO preamp section with individual EQ sections per channel. Documentation is in German only which is not a problem since I'm German 