My RV-4 plans show 1/4 " offset.  Do the RV-3 plans show the same amount???

Ken P.

Measured where Ken?  
 
I haven't actually looked at the plans.  Fred built my mount, and according to his site, he adds 1.5 degrees of offset if you want it.  Using that angle, and rough distances from memory, I figure I would need a 3/4" shim behind the left side of the mount to make the offset zero.  Of course that also would point the landing gear 1.5 degrees to the right.
 
Rusty (filthy from changing a on the side of the road, rather than in the comfort of my driveway)

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Rusty,
Page 33 of my RV-4 plans show 1/4 offset when looking at the TOP view of the Conical mount.  I would think that your mount is 1/4" in the other direction.

Ken P.