Sailplane Card Model Downloads Jan Müller's Duo Discus, Swift, & Slingsby T-21b Sedbergh sailplane models at http://www.cardmodels.de/ Marian Aldenhövel's ASK-13, ASK-21, ASW-24 and LS4. http://www.marian-aldenhoevel.de/ Text is in German. Click the links with the familiar names and then the PDF-Link at the bottom. Instructions are currently only available in German. Marian's pages for the Duo Discus kit includes only the parts that are different between D-KBPP and D-2925. You need to download and print Jan Müller's D-KBPP for a complete model.