one. When you solder, don't hold the iron more than 2 seconds on the LED, otherwise it can be damaged. Apply minimal solder
between each LED. I would NOT recommend to cut any wires until you have a working structure.
Step 4 - Solder in Rows
Go row by row, in the same way as before. Make sure to apply minimal heat, and place the legs just close enough to each other, but
not too close.
Step 5 - Add Reinforcements
You must strengthen each layer to make them stable and durable. This is so the layer doesn't come apart when you pull it off the rig.
Cut a piece of wire longer than the length of your layer and strip off the insulation. Place the long, stripped wire into a vice and pull
hard to straighten it. You can do this with another set of pliers as well. You should feel the wire get longer and straighter as you pull.
Once it is straight enough, place it on the opposite end of the layer and solder it on the cathodes to stabilize the rear end. Do this
once more for the middle section, as now it is the weakest part of the layer. I used clips to hold the reinforcement bar in place while I
soldered. These bars should strengthen the rear and middle of the cube so it won't break.