I am Rahul from India. I have learnt from your classes that Rahu and Ketu do not possess 5,7,9 aspects as per vedic texts.
Today, while I was reading the book called 'Dispositors in Astrology' written by J.N.Bhasin, I came across a sutra which is revealing the aspects (5,7,9) of Rahu and Ketu.
I am attaching the image of the page from this book where this sutra is found. I am not a sanskrit scholar hence I could not interpret it.
I hope this may be useful for your research.
Some books do say rahu and ketu have aspects, but that does not mean that they are correct in stating this.
Thank you Ernst for the reply