Hi John, find better words in german, but i try: the nocks made with sinew and rawhide. First, put sinew from the back to the belly, then in angle of 90 degrees.
The "string follow" on belly side is formed with a other string, with a slick surface. Once, if it`s dried, i put a rawhide over it.
The blue painting is mixed Ligusterbeeren*, Alaun* and Vinegar.
The yellow is also Alaun and Vinegar and Osage (fine strands)
*german ;-)