Ha ha and thats the third type of bead which i was going to mention but thought theres no point as it won't be that type, i haven't seen those in about 20 years easily, think its an old synseal or sheerframe profile and there is a special tool to remove those beads, think from memory it slips down between the outer gasket and glass. It all becomes clear now why the internal gasket isn't acting as a wedge to lock the beads in place because the beads don't shuffle back or forth, the refit the bead first you locate the front lip into the groove and then lower the rear of the bead down, tapping home with a plastic mallet and thats the bead locked in. The double sided tape is security tape and is there as a failsafe in case a burglar got the beads out