Other issues? Just lead poisoning. Don't lick your fingers. Seriously though, my days as a marshal at Colonial gave me a chance to sneak a peek into many a pro bag and there are a lot of irons and wedges with lead tape added. Nothing wrong with a little weight adjustment to get the right feel and flight, especially in your wedges. Your description of adding weight to the top is also creating weight furthest behind the center of gravity so that's why it is helping you open the blade. That location is also above the center so expect lower ball flight on full shots.