Ok, prototype finished and the performance trials were run.

As you note the Lexan has been replaced with a sheet of 1/2" Nylon, because the vibration was cracking the Lexan. We also added door sweeps to keep fine particles from being ejected around the edges of the plate.

Lots quieter with the nylon plate and adjustable rubber feet.

We also changed the screen tensioning design.

On two runs, it produced about 1% high grade kief by weight in 2 minutes of running frozen cured sugar leaf. Microscopic examination shows it to be primarily mature resin heads and an examination of the dregs show it still has resin, but mostly stalks.

Sorry I don't have extension tubes for the camera yet or I would send you close up pictures.