Hi Tartan,
I'm building a DFS-230 as well, to match the group-build Ju-52 tow tug. Are your plans by Hawkins or Neitzer? Hi-start or aerotow? I have digital files of the original DFS documentation. Alas, all in German.
http://www.rcgroups.com/forums/showthread.php?t=1136629&highlight=dfs+230&page=10
Best,
Vikram