1. Unclip one half of the forward edge along the windshield. This makes it possible to mount from within cockpit.
2. Screw the bearing pin into hex coupling. With the base centered over middle bow, with holes fore and aft, outline the base with a pencil to mark position.
3. With sharp instrument (ice pick) make 2 holes in the marked positions just large enough to insert u-bolt.
4. Insert U-bolt from below; place washer on to U-bolt and
   tighten lock nuts.

Center pin (shown) is not included with GS-7B
because it utilizes the standard pin that comes with a Gullsweep (GS-1).

To order this canvas mounting accessory (GS-7B) -
$13.00 each

Photo to left is a GS-7B with a GS-7. Both must be purchased for this rail mount option.