I really like my elastic ropes. You can easily adjust them to hold anything in place but with enough flexibility to move things around. It’s a bit like having five hands.
This stringer is more difficult to glue to the frames than the other one, because there’s quite a bit of torsion in it. I used some battens and elastic ropes to help with the twist. The blue tape on the battens does not stick to epoxy so I can remove them after the epoxy has cured.