Correct me if I'm wrong, but the only thing that matters in terms of vibration in a rotating assembly is that the CG is at the center of rotation, yes? The internal stresses will be different if you have the CG of each blade off by a mile, but in terms of vibration it doesn't really matter.

Adding mass to the "light" side of the center of any rotating assembly will move the CG closer to the center of rotation where you want it.

My first giant scale purchase was pretty recent, and I've never really balanced my 40-120 size props because it never seemed to matter much. I fired up the DLE55 and the thing shook the plane seemingly to death. My prop was off-balance, but the blades were the same weight. I had a hub issue, which would require adding weight to the hub on the 'side,' which requires a LOT of material, which may or may not stick forever. The cheap carbon spinner was also pretty far out of balance, which drove me nuts. I balanced it with CA, and got it pretty darn close but the CA didn't stick as well as I had planned.

I saw the VBR and bought one as soon as I possibly could. I also picked up the du-bro balancer. I put everything on there, with the prop bolts in the thing, and taped my spinner on and put the assembly on the balancer. After adding 5 setscrews, the assembly would stop randomly and I bolted it on the airplane. Next time out, the plane was quieter, ran up smoother, wheel pants weren't shaking themselves to death, etc. It was amazing. It works. As soon as there's one for the DLE30, I will be bolting one onto my Decathlon as well.

Also, FWIW, my Vess props required between 2-5 screws to balance, and my one Xoar required 4 if I remember right. Anyone who expects a prop to be good out of the box is delusional or blindly lazy. A friend of mine has a Mejzlik carbon prop that shakes his plane to death, and is in complete denial that it could possibly be out of balance... Oh well!

-Eric