The key elements of Cross Slot® openers remain the blades, discs and pressure plates and how they interact in the 📉 soil. The 
shown here are of a left hand SP blade (white) and pressure plate (green) fitted to a 📉 standard Mark 4 opener (black and grey). These components are brightly coloured for illustrative purposes.
The main advantages of the new 📉 SP system are:
Lower operating costs
Wearing parts are retrofittable to existing Cross Slot® openers
The blades self-align on the disc