I made the point on another thread recently that every hook, rig, etc needs to be tested as the buoyancy of every pop-up, wafter is different.
I very rarely use a purchased Wafter hookbait, if I want a critically balanced hookbait, then it is a pop-up that is carefully weighted with a shot or putty, a snowman bait, bottom bait under pop-up, or a bottom bait drilled out and filled with cork or foam.
That so sounds like Korda, and Ali Hamidi, and is one of the main factors on why I try not to use any of their products!