Great Planes Sequence 1.20 EP/GP ARF - GPMA1232 - Manual (Page 19)

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4. Temporarily fasten the cowl ring to F-1 with four 4-40 x
1/2" [13mm] SHCS and fl at washers—now you can test out
your new extended hex driver!
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5. View the cowl ring all the way around the fuselage to
make sure it fi ts well and doesn’t protrude too far over the
edge—it should be pretty much even or extend no more than
approximately 1/64" [.4mm] over the sides of the fuselage.
Where necessary, use a fi ne-point ballpoint pen to mark
the back of the cowl ring where it extends too far over the
fuselage. Remove the cowl ring and sand as necessary.
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6. Once satisfi ed with the fi t of the cowl ring, re mount it to
the fuselage with the screws.
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7. Use coarse sandpaper to roughen the cowl all the way
around the inside so glue will adhere. “Prime” the inside of
the cowl with a few squirts of CA accelerator to keep the CA
from leaking around the cowl ring inadvertently gluing it to
the fuselage.
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8. Position the cowl with a #64 rubber band to hold it into
position. Place the fuselage upside-down in your building
stand to get ready for gluing.
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9. You’ll need the back plate of the spinner for aligning
the front of the cowl, but it’s best to use the complete
spinner assembly which also usually requires the propeller.
If necessary, trim the propeller cutouts in the spinner cone to
fi t your propeller, and then mount the propeller and spinner.