Regarding D-Lite's being fan cooled. This is also something that's been discussed and we've found the answers.
All current D-Lite's in production are fan cooled. From what I've seen in my purchases and others here on POTN, we know that the individual strobes are the fan cooled version. We're not sure about old stock on the kits that B&H and Adorama have. Some people ordered the kit and got the older version. Unfortunately in all of this B&H isn't even aware of the product change and stock numbers are identical, so unless you can get them to do a physical check or you open the boxes in a store you don't know what you're getting. But that only goes for the kits, not the standalone lights.