Take the two JPEGs below and use the scaling feature when you print - scale to make the diagonal
distance between the center of the mounting holes 3.5 inches.
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ