Turning a Square Corner and Working Bars
The position of the pin on the bar line is just a teeny bit to the first side worked because, when the other side of the bar is sewed in, the temporary pin is left out and the tension of the joining side pair slightly moves the center of the join. This is why both sides need to have the same number of twists, an unequal number of twists will result in one side being shorter and uneven.
The corner uses fixing stitches ( ctctc ) with the last passive and the worker before the pin. The pillow is turned and a second fixing stitch with the same passive and worker pair is made. Watch your tensions here, it is easy to leave a long loop at the corner if you don't tension all 4 bobbins. The next two passives are worked through (ctc) before the temporary pin is taken out, a sewing made with the worker pair into the hole. The worker is now laid with the passives, and the old worker which has been waiting aside on it's own, becomes the new worker and continues to work the 4 passives, and is used to make more bars further along the band.