I have joined the second motif, leaving out the top rings at the second motif at the joining points and joining the rings in the middle, because otherwise there remained a too big whole.
The wool I used is a very thin wool for machine knitting, which I took double. This type of wool is very resistant. Also stocking wool can be easily used for tatting. When you work with wool, you have not to tie too much the stitches, because wool breakes more easily than cotton thread. But I think for those of you, who needle tat, this would be much easier.