Drilled the belly skin and gussets for the gear attach blocks as follows:
1. The text manual advises to invert the center section for this step. Then you have to transfer drill through the gear attach blocks. Access is pretty difficult that way, since the gear attach blocks are attached to the center spar which is now facing the workbench (downward). Instead of inverting, the center section was stood "on end" with the aft bulkhead up, the center spar down, and forward longerons overhanging the bench. Some wood blocks under the center spar kept things on an even keel.
2. The holes in the block are 1/4" (2 in each) and 3/8" (1 each). Going from zero to those sizes should be done in steps, so some spacers were used to drill pilot holes from the inside. The holes were then enlarged from the outside to keep from enlarging the holes in the gear attach blocks.
3. Performed test fit of bolts and gear block parts.
