Someone told me - not necessarily an expert - one could use so called "super glue" (I understand that he meant that (acryl based) glue that sticks your fingers together when you get the liquid between them) to glue the four inch voice coil to the cone (and spider). I have doubts, that this is "the" solution. Wouldn't "normal" two component epoxy glue be better suited?

Do have original JBL kits glued the voice coil and spider already together with the cone?