[Marileangorifurnimaluim]

I agree with your logic here, Mho. It seems clear the rings had their own nature and powers from design.

It's also suggested elsewhere that the three were different from the seven and the nine (when someone asked Gandalf about the three being used as a weapon "they were created for healing and preserving" - my memory is vague but serves, I believe it was the council of Elrond). The fact the one ring had a specific power to bind the other rings, unlike the others, supports this as well.

I agree, given the history with the silmarils, it was very unlikely the Dwarven Rings were made for the dwarves by the elves. In fact, the verse of lore "three rings.." etc. was clearly written after the betrayal of Sauron. So it refers to his dispersal of the rings.