I have a friend who would like to have his tzitzit tied in the “traditional Ashkenazi way” according to that request, what shitah would that be?
When it comes to tying tekhelet, there is no “traditional Ashkenazi way”. Here is how I would look at the issue:
1 ) If he is using Tosafot strings (i.e., 2 full blue and 2 full white per corner) then he should tie like Tosafot.
2 ) If he is using Raavad strings (i.e., 1 full blue and 3 full white per corner) then he should tie like the Gra.
3 ) If he wants to stay as close to the current Ashkenazi method of tying white (i.e., 7- 8-11-13) then he should tie like the Radzyner.
– Mois Navon