I use a 6 o'clock hold with everything but I think the intention is to use a bead as the POA. The 6 o'clock with the bead works for me because most of my shooting is at targets and the targets I use have a dark ring or dark circle that would otherwise be obscured by the bead.

I calculated the height I needed as a ratio based on the measured sight radius of my CZ, which is 730mm. So a 1mm taller front sight will give (1 / 730 x 100,000 =) 137mm height drop at 100m.

I've also now fitted the 9.5mm bead. I've decided to black out the beads (which were white) and the blade (which was silver) using a black marker pen. The light coloured sights disappear against the pale coloured targets that I use.