Guys, never tried any non rim weight balancing so no first hand info.
But here's what I don't get. We have possibly the finest tire balancing equipment available to us. Enter the correct info, operator does his job, tires get balanced to some specification. Job over. I don't know what a tire imbalance spec value is but the computer balancers easily deal with it.
Put your beads in, add the centras run the tire. What is the new imbalance value? Under or over the mfgr spec? Anybody know?
I've seen the videos and watched the demonstration, none that I saw were actual road tests, no values oz/in numbers just more like county fair demos. One video demo still showed its base was still wiggling, still out of balance?
I don't know if they (alternative methods) work but properly balanced with weights on inner and outer edge of rim is what I pay for. If I ever have a balance challenge, I'll look for a Hunter Road Force balance analyzer.