This is the last motif from Norma Benporath's New Medallions in Tatting.
This rather unusual shape piece is quite easy and straight-forwards to tat. I did not need to make any changes to the pattern as published on the site but I did change the construction method.
Firstly, the motif begins with the centre ring with 8 picots in it separated by 3ds. The instruction was to begin with 2ds, make the eight picots and end with one ds, cut and tie to complete the ring. (Note: two ends to hide). Starting with 2ds and ending with 1ds completed the 3ds separating the picots.
Round 2 is a shuttle-and-ball pattern which you can begin with CTM to reduce one pair of ends, but still ending up with one pair at the end of the round.
My way was to start with 3ds and make the 7 picots, ending with another 3ds. The eighth picot is a mock picot as I jump out of this centre ring with a split ring. (Note: no ends here). My Round 2 ends with a split chain, followed by another split ring to jump out to Round 3 (note: no ends here, too).
BTW, Jane gave a very clear description of mock picot in Day 3 of her TIAS which, if you have not started on it, you don't know what you are missing. Even if you don't plan to join the TIAS (but I hope you do), go over to the TIAS blog and enjoy reading Jane's commentaries of the guesses that have been coming in. I need to catch up on the TIAS myself as I am only at Day 2.
An interesting feature of Round 3 is the sharp turn in the chain on the two sides of the motif. This effect can be achieved by making a SLT or tatting a mock ring. Usually, an SLT or mock ring is utilised when making a ring sitting atop a chain without using a second shuttle. This is the few times where the technique of SLT or mock ring is used for a design element.
For discussion purposes, if a second shuttle is used, the resulting chain will give a smooth curve as in the other six chains, and will show a totally different effect to the motif.