I have the SewEzi table with my portable Singer 15-91 set in it and it is very sturdy. The SewEzi table was originally bought with the hole cut for my Babylock Espire but I found I could also set the vintage singer 15-91 down in it with the portable case bottom included. It works fine. It is not wobbly. So now I can use the table for 3 of my machines - the Babylock, the Featherweight, and the 15-91. I ordered the acrylic inserts for the Espire and the FW. Also, I ordered the plastic wedges that adjust for machine height that they call the Optional Change System and I use these with the various machines. I am very happy with my table.