I thought the metal sled had a vacuum passage underneath with a vacuum port built in. If you look at the metal maslow web page, they have pictures:
On my wooden setup I countersunk a piece of acrylic with a hole i the middle so the chips don’t get away from the vacuum along with some v grooves from the edges for more air flow so the sled doesn’t stick to the work piece. Works pretty well.
The point: the 3D printed attachment you seek is not the only solution for a metal sled vacuum attachment. The metal sled has 2 vacuum options:
- Uses the under side of the sled with the plastic slider as the vacuum seal
- C channel on top of the sled someone recently posted on facebook asking what the c channel piece was for…
I believe that goes on top of the sled as a vacuum channel.
Good luck!