Dug in to fitting lower cowl brackets. Drilled holes in the lower nosegear reinforcing plate. This was tricky to layout and drill. There's no access the inside of this plate. Then got the cowl on, and carefully positioned the U720 parts and U620B. Then carefully drilled U620B to the engine mount, starting with a #40, checking the location, then up to a #27, then finally to #12, making round trips between the bench for drilling, and on the floor underneath the plane for marking.
Looks like it came out OK, although the holes on the engine mount aren't well lined up. Then drill U620B to U720B.
This task will be done in a day or two, and then it's finally time to drill and install the milspec fasteners.