So why has the process on everything stopped? Simple, my vacuum-form machine failed. But I have at long last resolved the issues with it. This is a list of solutions for the machine:

Problem 1: Uneven heat distribution.
-The heater for the machine is not square, it's round. The edges remain too cool for the plastic to properly mold. Simple solution, use a second portable heat source, such as a heat gun or small blow-torch, and while the machine is running, heat the edges with the portable source.

Problem 2: Garden-blower malfunction.
-This machine's sucking power appears to be too potent, thus it does not suck the air as I want it to in order to shape the plastic (It's called "garden-blower", but it's got a second mode to suck leaves). Slightly expensive solution, buy a regular $30 vacuum and the problem will be solved.

Problem 3: Holed-board.
-Not enough holes on the board, the garden-blower's sucking function was an independent problem. But the fact the board did not have enough holes also affected the shaping process. Simplest solution, pick that drill up and get to work.

Problem 4: Plastic holder.
-I am the biggest moron ever for thinking that 4 cheap, thin, plywood boards were good enough to hold a plastic sheet over the heat source and not think about how all the heat was escaping. Solution, build a better holder that prevents the heat from escaping.

Problem 5: Vacuum hose.
-The hole for the vacuum-hose to enter was made on the side of the box, ruining one of the box's sides. Solution, remove the ruined side and replace it, and then make the hole beneath the box where the new vacuum's hose shall go in.

As you can see I have some work ahead of me, my machine looks quite amateur as well, but I shall build a more proffesional one in the future. Until then, I'll ensure this one works.