Also, depending on the thickness of your plastic, you will lose some resolution of your formed plastics edges and lines.
This is one of the videos that explains a lot. I built my tank system, after his. ( he has another video, and parts list) ( but you dont need a tank system, i used a shop vac for years, they do fine, for thin plastics)
But here is a recent simplified tutorial
https://youtu.be/Tugr2juVWuk
Link to original page on YouTube.