I’ve been looking into tekhelet and glad to see the practice resurrected. While I know that there are many ways to tie tzitzit, as a Sephardic Jew, I’ve heard that the 10-5-6-5 with the ridge is the typical Sephardic method. Is there still a need to have the first and last wrap the same color as the tallit in the 10-5-6-5?
All the customary methods of tying tzitzit with white only were developed to infuse the tzitzit with meaning lost with the loss of tekhelet. When tying with tekhelet, one of the tekhelet methods should be employed. Sephardim should tie the tzitzit with tekhelet according to the Rambam method.
– Mois Navon