A hole should be started about 3/8" deep in the center of the ends of the axle to insure the screws going in properly.
The cart handle is made 1/2" × 1" × 30", with one end rounded and the opposite end chamfered 1/8". On the latter end measure in 5/8" on the wide side and bore a hole carefully with a 1/2" bit. Cut a piece from a 1/2" dowel, 3-1/4" long, and insert it in this hole, keeping it in place with glue and one 7/8" brad.
Bore a hole 1/2" from the rounded end with a 3/16" bit.
The two pieces which hold the handle are now made 3/4" × 7/8" × 2-3/4". A 3/16" hole is bored in the 7/8" edge of these pieces, 1/2" from the end. These holes, and the hole in the handle, are to receive a round-head stove bolt, which is 3/16" × 2-1/4".
Glue and screw these two pieces in place in the center of the front end of the underbody, leaving about 1/16" space between the handle and the edges of the blocks for freedom of movement.
The dumping handle is made of pieces of dowel, the main piece being 1" in diameter by 4-1/2" long. The other pieces are cut from a half-inch dowel, 3" and 3-1/2" long, respectively.
On the main dowel bore holes with a 1/2" bit, 3/4" from the ends, to receive the shorter dowels. Glue and insert the 3-1/4" dowel and bore a small hole to receive a 7/8" No. 6 round-head screw. Place this screw and then insert the dowel through the front upright into the front supporting block and flush with the inner surface of the front box end. Hold in place in the block with glue and a 1-1/4" No. 8 round-head screw.
Glue and screw the 3" dowel in place for the grip.
A piece of 1/2" dowel, 2" long, is similarly placed through the rear upright, thence into the rear supporting block and box end.