Insert the two smaller posts into the two corners of the upper shelf opposite the push handle. If these posts don't sit flush in the corner hole, flip them upside down.
Insert the tripod holder on top of the vertical posts. The hooks should face the outside of the cart.
Note: It's possible to insert the optional Mitchell Mount accessory instead of the tripod holder for rubber head storage on this cart. The Mitchell Mount accessory can face in or out, just keep in mind that if it faces out, the cart could become dangerously back heavy depending on the weight of the head that is mounted.
Now that the entire cart is assembled, use a 5/32" allen key to tighten all set screws. This will create a very sturdy cart.
Slide the 10" rigid caster wheels into the caster mounts at the same end of the cart as the luggage wheels.
Slide the 10" swivel caster wheels into the caster mounts at the opposite end of the cart.
Install the 4 caster locking bolts and flip the bottom shelf over onto its wheels.
Note: Ensure all set screws on the cart are backed off using a 5/32" allen key. Avoid tightening all set screws until the entire cart is assembled, then tighten all set screws. Assembling the entire cart before tightening anything is much easier.
Insert the four large corner posts in the lower shelf.
Install the top cart shelf on the four corner posts and ensure it drops down on all corners until it bottoms out on the post collars below.
With the cart upside down use an allen key to remove the four bolts from the large corner pins and remove the bottom cart shelf from the top shelf.
Remove all parts from the inside of the cart.
Turn the bottom shelf upside down (the shelf with the caster mounts on it).
Remove caster lock bolts from the bottom of the cart with an allen key. There is one bolt for each caster mount.