My initial idea to use the same type of tonearm that came with the turn tables for the third tonearm, might have been wrong. Again, I’m in the position of not knowing what I’m doing but knowing what I want to achieve. A potentially dangerous mix, but in this case, an enjoyable place to be.
Rimes of the Ancient Mixmaster 
I like your approach even though you’re unsure.
Thank you Maria. I’m glad to know this is of interest, and to let you know that I am very happy with the end result.