I've tried on two different boats that came with CDI furlers that the plastic luff extrusion became bent because the previous owners just laid the furled headsail along the mast and tied it there. Yup, CDI says just lay it in the sun and it will straighten out. Well, I had them in the hot Southern California sun for weeks and that never did a thing to either one. Went to a hanked on jib on the Capri-18, and wasted the money to buy a new luff extrusion for the C-22. Ended up selling the new genoa and the CDI furler with the new luff extrusion to someone who just had to have one. Put a new hanked on jib up front, rigged up a simple downhaul and never looked back.
When CDI rolls up the extrusion to ship it, they are right, lay it in the sun and it lays out nice. But if it's got kinks and "S" bends in it from not being properly supported while trailering or being stored with the mast down, you'll need a new plastic extrusion. Guess folks get so excited about their CDI furler, they forget to read the manual.
Don