MyCousinVinny

It leave a thin slot basically. Not very much vacuum leak at all. Not as bad as a gate that does not close all the way.

If you are familiar with these plastic Gates on your dust collection system, After a while of use they do not want to close fully. Therefore, not sealing when closed which causes lose of suction to another piece of equipment. The inside slot that the slide gate move in fills with wood dust and chips and every time you close them it packs it in more. I used to take a nail every few months and clean out this grove but it is a Pain. Since I did this 2 years ago, I never had a problem again. If you look a the picture, I just shaved the corner so it would be open to alow the packed saw dust to drop out every time you close it. in the picture you can see the actual wood packed in it right after I cut the corner. If you look at the gate closely you can see it was not closed all the way, That was as far as it would close before I did this.