Thank you, Iyer Sir.
Its HD foam, salvaged from box used for storing certain drugs.....4 panels joined to make 3....11.5+25+11.5 covered with tape.
yes, the stab is mounted on a 'pedestal' as I read and the ele can move about .75 in up and down. Controls are 0.5mm steel wire pushrods.
Also, I just checked the weight of the ballast - its 4 lead pellets (0.22 cal) each weighing a gram !!!! so 4 grams only....(and not 8 grams
)....seeing the difference this has made, I am inclined to reduce it by one unit at a time to see if the launch gets affected while decreasing the sink rate ( difference evident from the two videos)......
will try with additional nose weight and explore your suggestions......BTW. Its actually quite fun to launch it DL way even without the peg.....but the wing slides and the bands cut in to the wing(no LE reinforcements) but javelin launch has its own charm
Edit: Its the fuse and not the wing that slides in a Discuss launch, when fastened with dowel+bands. Nylon Screw is the way to go.