Must say the tubeless tires I went with after reading your thread have been great on my Shamal wheels which have rims desigined for them. According to Zinn on Velonews the tubeless specific rims have an extra little ridge at the end of the tire hooks deigned to match a little flat in the tire. I only got a seal on 1 of the 3 non-tubeless rims I tried to convert.
Have you used Stan’s rims? I heard they are tough to get the tires on. But it was no picnic getting them on the Shamals either.