Quote Originally Posted by DSTP View Post
Any way to add a metal screen spark arrester to keep the filter/box from catching fire?
Good idea. I may implement that on the next version of this, maybe right at the inlet on the end of the pipe. For now, I have ~15' of pipe on it, and the suction power is fairly low, so the risk of a spark making it all the way back to the cardboard is quite low. However, I am keeping an eye on it as I do welding.

Thanks for watching!