I spent an interesting Sunday with the Monospar ST.12 and the engineer rebuilding it at Newark. I have a few drawings including some published in L&K as well as UK ones, so I wanted to check them all out and update the best. The Czech ones were riddled with errors.
The Stieger construction certainly is some thing very different and a real challenge. An interesting aside is that the extruded metal parts are the same as used on the Gladiator.