I once came across a reference to German SS co-operation with Finland on a proposed lightweight wooden test disc craft with the Thule/Vril T7 engine. VL was not contracted due to production problems, so the shell was built by the Finnish Army. Apparently, the project was started but stopped as not completed as Germany would not export the T7 engine. The Finnish wooden disc form would have been exported to Germany for testing in Hauneburg (a military test area codename). The Finnish name was to be "Sunray". Sunray" could have a few different translations. Maybe "auringonsäde", "päivänsäde", even "auringonpaiste" (which is more like "sunshine"). This craft remains a mystery as it was to be unmanned, lightweight, maybe for low flight recon. The Germans worked with Italy at Fiat Riva del Garda on co-operation disc technology and also with Japan (Mitsubishi and Nakajima). To a lesser extent with the French through S.A. Wibault. Germans were to help VL with a wooden "Mosquito"-like aircraft called the Vihurri, but again the Germans did not like to export their engines, in that case DB 605s. Whatever the Sunray was, only the wooden shell was partially completed before all efforts stopped...