Get easy perfect solder stenciling with the magik solder stencil vacuum box. Now its also fully 3d printable with no other parts than 3d printed plastic.
Modify the f3d Fusion 360 file to build your own. And look at mine for inspiration. This is hands down the thing that made making electronics at home more easy than anything else. You can even apply paste in a very very bad way and it still gets good.
Check out my youtube video on how its used. The latest version is the ORANGE and BLUE version described in the video here: