There's a lot of confusion and ambiguity over the question how one should tie techelet tzitzit. Recently we received this email from a customer who ordered a tallit with Rambam tying.
"I was just approached about the Talit Gadol that I have received with the 13 chulyot tying method. And I was told that it is invalid and not up to standard according to Halacha because it does not have 6 knots [sic. he means 5 knots]. I was very surprised because I know how strict and careful your company is to provide the correct tying. Are the wraps themselves knots? I didn't know what to say. I'm assuming that they are just unfamiliar with the minhag. Thank you for your time. By the way, I love the tallit. and the tzitzit. I'm sure we can figure it out."
I wrote him the following reply, which may be helpful for anyone out there wondering about Rambam/Yemenite tzitzit tying.
What he meant is that the Rambam is one of the most prominent Rishonim, and in this case can be considered authoritative enough to be relied upon.