Instead I housed the wheels on to the bottom of the cart itself. This project was initially quite complicated but I was more than pleased with the more simplified design that evolved.
Step 1
Cut out the pieces for the box part of the cart. The back is 400mm high, the front 320mm high and the sides have a 80mm slope on top falling from back to front. The cart is 320mm wide and 250mm deep.
Step 2
Using a piece of flexible timber or plastic pipe, mark out the curved handle shape on to a sheet of plywood. I cut out two pieces from some spare 20mm ply and then joined them together with two-pot epoxy construction glue. If you're using 12mm ply you could glue together three pieces.
Step 3
Shape the handle using a plane, sandpaper and a small grinder with a sanding disc.
Step 4
Glue the box together and allow to dry, shape the corners with a grinder and sanding disc then finish with sandpaper.
Step 5
Using two-pot construction adhesive, glue and screw the handle to the box.
Step 6
Drill holes for the wheels. Mask the handle with masking tape and paint box inside and out. I did four coats and sanded in between each one. Once the paint is dry, mask the box and polyurethane the handle.
Step 7
Cut the handle in half and attach a strap hinge so it folds, then attach a suitcase latch to hold the handle securely when it's open.
Step 8
Attach the wheels and lid. The lid hinges on the front which makes it easier to open and avoids any complications with the handle.