As I've understood it, we're talking about two separate problems. The HA-2 had the interference problems even before 10.3, and after 10.3 something seems to have happened that has started to cause problems with other DACs as well. Which ought to mean that for iPhone users with 10.3 and the HA-2, we're going to have two problems at the same time - random dropouts because of 10.3, and the interference problem when you reach a low coverage area. IMO, it will be hard to fault search the interference problems again until the problem with totally random dropouts on all DACs is resolved. Copper tape or not, your HA-2 is very likely to have dropouts because of the 10.3 issue.. If you have dropouts even with copper tape, well, you could have solved the interference problem, but still have dropouts because of the 10.3 issue..