To the inventor of the Shoebox...... You rock dude!!! Takes my 88 cubic inch Air Venturi from ~3000 psi back up to over 4000 psi in about 15 minutes.
Action video (slow mo ~45 seconds): https://www.youtube.com/watch?v=unQmyDGhRXo&feature=youtu.be
Action video (slow mo ~45 seconds): https://www.youtube.com/watch?v=unQmyDGhRXo&feature=youtu.be