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3. Knots<br />
The alignment of the station lines on the sides of the<br />
four lifts of the plug are being verified. Thrre are<br />
discrepancies.<br />
Despite slaloming among the knots in drawing the<br />
waterlines, some half lifts ended up with knots. For these, it<br />
was necessary to drill out the knots and fill them with<br />
bungs.<br />
I found that a 19 mm keyhole saw could cut out a bung to<br />
fit into a knot drilled with a 16 mm. drill.<br />
The two bits used to drill through knots and then<br />
fabricate a bung. The 16 mm. drill removes the knot.<br />
The 19 mm. keyhole saw produces a bung which will fit<br />
tightly in the hole drilled.<br />
A keyhole saw bit has a drill in the centre to guide it. The<br />
bungs needed to be solid throughout, so it was necessary to
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