Wd-626 with "how to make it" shown on Sheet 60 of the plans.
Sheet 60 shows it as individual pieces Wd-626A to Wd-626F
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