Old school Pesavento Gartley. An ab=cd measurement completes at 0.618XA. Note the targets!
This pattern is rarely used. Mordern variation is 0.786XA+ab=cd which requires deeper B-point and C-point ratios.
This pattern is rarely used. Mordern variation is 0.786XA+ab=cd which requires deeper B-point and C-point ratios.
