Thank you for your previous answer. I am following up from my previous question (https://www.yeshiva.co/ask/58214) so I can clarify. I have bought these sepharadi tefillin abroad so I cannot return them to get ashkenazi tefillin in exchange. It is good to know I do not have to worry about the parchments and their writing. The thing is the tefillin already have the knots made according to the sepharadi custom. Regarding the hand tefilah, since I am right handed I would need to either a)wrap them counter clockwise (outwards, like sepharadim or chassidim do) or b)do some strange wrapping above my elbow to be able to wrap it clockwise or a third option would be c)to try and untie the knots and tie them according to the ashkenazi custom. What would be the most appropriate option? Thanks in advance.

ב"ה Shalom again, As I said in my previous answer, you are fulfilling the Mitzva of Tefillin with what you have, but in the long run, the best would be to have the proper "parshiot"= parchments which follow your Ashkenazi minhag. I understand you are not in the same country where you bought it, but I'm sure there is a Sofer Stam where you currently are who can write new Ashkenazi parshiot or perhaps exchange what you have for Ashkenazi parshiot. If not, I can try to make connections there with someone there who can assist you. In regard to the knots, you can find on the internet filmed demonstrations of almost every possible knot to make for Tefillin and you can change the knots. If you feel that you don't want to do it on your own, ask around in your Shul or community who can do it for you. מסכת תפילין פרק ראשון : כך היה ר"א אומר גדולה היא מצות תפילין שכך אמר הקב"ה לישראל (יהושע א) והגית בו יומם ולילה .אמרו ישראל לפני הקב"ה: רבון העולמים וכי אנו יכולין להגות יומם ולילה? אמר להם הקב"ה: בני הוו נותנים תפילין על ראשיכם ועל זרועותיכם ואני מעלה עליכם כאילו אתם הוגים בתורה יומם ולילה... All the best