Fabbed spacer and match drilled to F-109 bulkhead. Used #10 screw to mount spacer and 7/16 hole for hinge pin guide tubing. Tubing directs side cowl hinge pin to the first grommet on lower cowl hinge. From there push to insert from inside the airplane. Still hard to install one pins into cowling, but will try some Boelube and open up some sticky grommets to ease installation.