Quickie Q2 Lite Construction Manual - page 53
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Using a small hone, grind the cutting edges of your drill bit flat
as shown (not undercut). This will keep the drill from grabbing into the
glass. Don't over-do it, just make a couple of light passes with the
hone.
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In several places rough, cured glass surfaces occur where overlaps
or thick buildups are done. These rough edges should be smoothed as shown
using a grinder or sanding block.
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The Dremel (Moto Tool) or Home Shop (Weller) is a very versatile
tool with many uses in the construction of your Q2. The kits usually have
a nice selection of bits, cutters, grinders, stones, and mandrels for
every conceivable use. The three types of bits shown here are the most
useful for your project. Don't throw the others out, as your next door