Danny, your process is correct. As for the 70%, it’s probably a little lower than I usually see, but segmentation studies are so different one to the next that it’s hard to say for sure. Check the pseudo F statistics and maybe drop attributes that have low F statistics and rerun. That often improves reproducibility. Also profile your segments on other variables to see if they appear valid. If your sample size is large, there are other ways to validate that we can discuss.