Thanks so much for the clarification, everyone! I would love to jump in with both feet and order the complete set of Harmony Interchangeables but...I've shown a nasty habit of shelling out $$$ when first starting with a new hobby and later finding those impulsive purchases really don't meet my needs. So, for the time being, the Harmony set is on my Wish List, and I'll start by first trying some bamboo needles. Many thanks again for all the great input!
Judy in OKC