I made short throw projector stand for Anker Mars II : r/projectors
New Ultra Short Focal Projector Plastic Lens Optical Mirror Reflector Retroreflector Glass For Dell S500 For Nec U250x U310w - Accessories - AliExpress
The Right Screen For An Ultra Short Throw Projector - Carl's Place
DIY short throw projector update : r/projectors
EZ DIY HOW TO HAVE A 2.39:1 PROJECTOR THAT WON'T COST YOU $5000 AND UP! - YouTube