Captain america shield question

Hello I am sure this is posted somewhere im just running out of time on this and 4 other builds for out local comic con.
Just wondering what glues work best for attaching the back strap supports and the star I have locktite 5 min epoxy but I think its a tad soft I have not used JB weld But I have seen on other posts guys like that lastly how are you clamping down the star for glueing
Thanks you I am sure the answer is in a thread somewhere just cant seem to find it hoping someone could post a quick answer
Thanks jerry