I'd like to know how easy it is to disassemble the whole mod, so I can take that long front screen protector piece out and replace it with a black metal piece eith a cut out and plexi for the screen and cut out for the buttons.
I didn't take my Cuboid apart, but I did remove the batteries and study the inside a bit. While I know that everything that goes together comes apart, I see no screws, latches, or catches inside. All I see are two very small star screws on the top that take a T5 bit; one near the 510 in a corner, and the other in the corner on the far side. Removing them does not give easy access to the electronics because the top section seems to be a tight press fit along with the two T5 screws.
Looking into the battery chambers with a magnification lamp, I see two black sleeves that surround each battery. They appear to be installed from the top. I see two more T5 screws on the battery door that secure the contact plate to the door, but I can't see how removing that would help to gain access to the screen. It appears that everything you want access to would be gained from opening the top section where the 510 is.
So "how easy it is to disassemble the mod" would start with how difficult it is to remove the top section. I did not try to pry it out beyond pulling at it with fingernails in the gap, but mine is in there pretty tight. Sorry I couldn't be of more help, but if you don't have a Cuboid, this may give you an idea of what it might take to gain access to the screen. It looks like once the top has been removed, the innards would come apart similar to the way an iStick 50W does. That is, all of it pulls right out; screen, screen protector and all. I think you would most likely see the upper + and - battery terminals on the bottom of it along with the electronics and screen.