Great Planes Top Speed - GPMB1050 - Manual (Page 7)

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2. Use a 5/64" [2mm] drill bit to drill holes in the center of
the hardwood blocks. Use caution not to drill through the
bottom of the hull. Also, there are two indentations in the hull
towards the transom. Drill these locations using a 5/64"
[2mm] drill bit.
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3. Thread the Retaining Hooks into the blocks and hull
as shown in the photo above. Screw them in until the
threads are barely visible.
❏ 4. Trim the front of the hull 1/4" [6mm] inside the outer edge.
This is where the weight to balance the hull will be placed.
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1. Locate the Upper Tunnel. Trim the upper tunnel along
the lines scribed onto the tunnel.
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2. Use a 1/8" [3mm] drill bit to drill four holes into the
upper tunnel at the indentations. Use a 1/4" [6mm] drill to
drill the location for the antenna exit.
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3. Position the upper tunnel onto the hull. The angled end
of the tunnel faces the bow, or front, of the boat. Hold the
tunnel in position and mark the locations for the tunnel hold
down screws through the 1/8" [3mm] holes in the tunnel.
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4. Use a 5/64" [2mm] drill bit to drill the four locations for
the tunnel hold down screws.
Prepare the Upper Tunnel
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