Zipper Manufacturing LLC
P.O. Box 275
Mt. Orab, OH 45154
ph: 937-444-0904
zipperbo
You can tell your top limb from your bottom limb by the lenght of the limbs. The top limb is slightly longer. Also the bottom limb is marked with a B on the flat part of the wedge on the limb pocket.

For checking the brace height on your Zipper, use the back of the shelf as the reference point. Each bow may be slightly different. Here are the recommended brace heights.
The brace height for a Standard riser is 7- 71/2".
For an Extreme riser it is 6- 61/2".
Brace height for the SXT is between 61/4"- 63/4".
The brace height can be adjusted by twisting or untwisting the string.
To increase brace height leave the string on the top limb, twist the bottom of the string clockwise, 12 twists is usually 1" . Restring the bow and measure the new brace height.
To shorten the brace height, twist the string counter-clockwise.
We recommend 8- 10 grains per pound for arrow weight.
Zipper Manufacturing LLC
P.O. Box 275
Mt. Orab, OH 45154
ph: 937-444-0904
zipperbo