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- Refer to Fig. 2 and place the solderless breadboard inside the
case as shown. Place one end of the solderless breadboard flush
against the inside of the rigid side of the case. Slide the
breadboard along the inside of the case until its upper side is
exactly 7 cm from the inside of the front end of the case.
- When the breadboard is in the proper position, hold it
securely and twirl a 3/32-inch drill bit in each of the four
holes to mark drill guides in the bottom of the case. Check to
make sure the breadboard was in the proper position.
- Remove the breadboard and drill a 1/8-inch hole at each of the
four drill guides. Hold the case firmly while drilling. Don't
worry about plastic shavings that remain attached to the case.
We'll remove them later.
- Close the case for this and the following steps. The upper
side of the case is the lid. Orient the case so the lid opens to
the LEFT. This means that the flexible side of the case is to the
left and the rigid side of the case is to the right. With the
case oriented like this, place a piece of masking tape on the
upper end of the lid to indicate the upper end of the case.
- With the case closed, use a small drill bit or scribe to mark
drill guides in the center of the flexible side of the case 4 cm
from the top and bottom edges.
- With the case closed, use a 5/32-inch bit or its metric
equivalent to drill a hole at each of the two drill guides you
just marked. Hold the case firmly while drilling. The plastic
case is very soft, so drilling is easy. (Don't worry about
plastic shavings that remain attached to the case. We'll remove
them later.)
- Place an angle bracket along the rigid side of the top end of
the case (see Fig. 3). With the bracket held flush against the
shoulder extending from the bottom of the case, use the hole in
the bracket as a template to mark a drill guide. The hole will be
around 16 mm from the top end of the case.
- Repeat this procedure to make a second drill guide in the
rigid side of the case 6.5 cm from the bottom end of the case
(see Fig. 3).
- With the case closed, use an angle bracket to check the
position of both drill guides. It is VERY important that the side
of the bracket is flush with the lower edge of the case as shown
in Fig. 3. This will keep the bracket from moving after you attach it to the case.
- Use a 5/32-inch bit or its metric equivalent to drill holes
at the two previously marked drill guides.
- Mark drill guides centered 1.8 and 4.5 cm from the bottom end
of the rigid side of the case.
- With the case closed, use a 5/16-inch drill bit or its metric
equivalent to drill holes at the two previously marked guides.
Hold the case firmly while drilling.
- Mark a single drill guide in the center of the bottom side of
the case (Fig. 2). Check to make sure you marked the guide on
the bottom end, not the top end, of the case.
- With the case closed, use a 15/32-inch (best choice) or a
1/2-inch bit or its metric equivalent to drill a hole at the
previously marked guide. Hold the case firmly while drilling.
- Carefully remove any plastic that remains attached to the
edges of any of the holes. A sharp hobby knife may be necessary.
CAUTION: Use care when using a knife to cut away any remaining
plastic!
Note: Two more holes will be drilled later.
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