I must say thank you. I had taken off the tupperware, not the first, and always put the wrong size screw some where, so this time I was going to ask if there was a diagram, and before I ask I looked up technical on the forum and found one. So, whoever thanks....................this forum rocks as always.
First time I took my plastic off, I discovered that several screws were missing. I didn't like the black heads, so went to a hardware store and bought a bunch of stainless screws. I put those everywhere there was silver or metal. Looks much better. Saved all the extra black, originals, in the tool kit.