ah ok and I didn't realize from your dwg that the cone is actually the filter element! The picture tells the story.
Regarding stabbing with cured CF - I fell your pain. I redid all the empennage fairings on my 4 in CF. I had numerous punctures. It hurts! 
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Scott Black
Old school simple VFR RV 4, O-320, wood prop, MGL iEfis Lite
VAF dues 2021
Instagram @sblack2154
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