I didn’t
carefully plan how to cut out the parts from the two sheets of ugly plywood
(mostly because the parts were “invented” as the project has evolved) and now
there isn’t a scrap left big enough to build the small triangular ground board
needed to support the entire scope. Off to Home Depot…..

¾”
fir a/c plywood ground board
brass gas fitting for center bearing
slotted and screwed into rocker box