2 beat kick
I have struggled with this all winter. I studied timing watching Teri in the video. I had the revelation as follows: I tried to time the kick with the same side arm movment which lead to subtle timing issues and lack of propulsive energy via the core. I have realized now its the timing with the opposite spearing hand. When the spear is initiated ,which is after the mailslot entry, the opposite leg kicks transferring the energy to the newly anchored hand. Since this is about timing the tempo trainer has made the biggest difference keeping my timing left and right together and on track over the long haul.