A distinct cultivar of Dahlia plant named Margaret Improved, characterized by its upright plant habit; freely branching habit; full and dense plants; double type inflorescences; and yellow-colored ray florets. Immediate and extended neighborhood pixel values are selected. Preferably, a level sensor measures and communicates a degree of horizontalnessverticality of the platen to a machine controller which, in turn, generates a control signal to cause variation in cylinder pressure in the anti-tilt actuator, thereby achieving substantially continuous alignment between the mold halves and reduced component wear. A second variable-length material strip extends as the first material strip but relative to the left breast.