I have read the treads on this topic, but I still have a few questions. How often or important is it to be able to adjust luff tension on a roller furling?. I am leaning towards the CDI because I believe in the KISS theory. The less parts , the less things to break or fail at the least apporiate times. I would be intersted to hear if you have a CDI would you buy another one. any problems? thanks in advance.