Mastercabman,
You might want to burnish the newly installed strip from the underside with a piece of wood on the glued areas. At class they suggested that depending on the size of a j-roller you might not get enough pressure.
Proclive,
Some here have been able to heat up their strips to soften the adhesive, remove, and reapply. The new clear strips have an adhesive that sticks to the strip better than the old did. Makes it more likely to stay on rather than separate. Some have used spray adhesive to remount the black strips, some have used double sided tape, some haven't had the need because they came off perfectly.
Peter