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John Barrett etal:

<< I removed a 1 5/8"  circle of inner graphite and honeycomb 4 inches behind the bulkhead that the  Hydraulic pack attaches to and about 3/4" below the joint for the upper  fuselage.  Did this on both sides.  Mark Mahnke at Lancair confirmed the
position. >>

I've found a great variance in the IAS using this location, the curvature of the fuselage seems to cause a lower pressure area aft of the baggage door, resulting in a lower IAS.  This of course can only be verified, once finished, with some speed runs based against the GPS.

Mike

LML website:   http://www.olsusa.com/Users/Mkaye/maillist.html
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Please send your photos and drawings to marvkaye@olsusa.com.