I know I'm joining the party late, but 'Welsh Thuringian' is a term that lacks any credibility whatsoever. The fact that it may be Welsh precludes it from being Thuringian. Wales is a small country in the UK, Thurinigia is a state within Germany. Let's call it Welsh slate, Yellow Lake, DT or something else. This is meant to be a site where intelligent discussion takes place. Please, let's not undermime that objective.