It will be tricky thats for sure......:lol3mm is nice and thick...what was the final thickness after you pulled it?
what thickness will you pull over the taller/lower form? -- its going to get pretty thin considering the length of pull (maybe start out even thicker than 3mm?). sounds pretty tricky!
1mm seems a little thin for the main/tall section IF it supports itself. i'm assuming you'll have an armature/rod connecting the "bottom"/main thruster section to the equator disk?