I finished my Gilders icons sets all which I were used are included. Set has their own separate OOb for test including lbm's and of course shp with icons of gilders. My main source of data and drawings was: Tadeusz Królikiewicz. Szybowce transportowe. polish book which try
cover whole subject and for photos + additional data this Russian site
http://www.airwar.ru/gliders.html
Additionally to gilders there are included icons of transport aircraft’s build based on gilders with engines and Potez XXV icons corrected to their real size.
some samples of airframes included in shp