Now and then you have material that’s warping. especially when it’s under or up to 1/4" plywood.
I didn’t want to use magnets so I made 4 hold down screws as solution for these thicknesses.
They are designed to work with the crumb tray in place. I just finished making these to be able to continue running jobs. Tomorrow I’ll make better ones that can hold down any thickness with the crumb tray in place.
I used 4x 30mm screws with a 6mm diameter head. Cut off 2 sides of the head so the head of the screw fits through the crumb tray and can be twisted a quarter turn. Then I used 4x small pieces of draft board and screwed 1 screw per piece into them.
There is no sense trying to screw down your material with these hold downs. You’re better of wedging another piece of draft board under the hold downs.
I hope you can use these hold downs