Can you mix slingshots 70 and 80

Slingshot 70 and 80 can not be mixed.

1, the back hand positioning (or the leather band on the face position) high, below the corner of the eye, above the most prominent position of the zygomatic bone, the choice of 70-75 outer bow door slingshot.

2, the back hand positioning (or leather band on the face position) near the most prominent position of the cheekbones, or a little lower, the choice of 75-80 outside the width of the bow door.

3, back hand positioning (or leather band on the face position) and the level of the tip of the nose, or a little lower, choose 85 or so outside the width of the bow door.

4, the parameters are different. Less than 70 millimeters is a small bow door. And 80 millimeters or more is a large bow door.

5, the distance from the target is different. The larger the bow door, the smaller the distance of the upper bow eye from the target, the smaller the bow door the larger the distance of the upper bow eye from the target.

6, the large bow door in the horizontal grip when aiming, is better than the small bow door.