New Member

[Kitwn]

Dave,
Without knowing details of the materials you make, the previous CNC machines you have bought and how hard you tried to make them work correctly it's difficult to give a definitive answer, but my gut reaction is that your first resort is more experimenting with the choice of cutting tool and the feeds and speeds used on your existing machine(s).
My apologies if you've already spent several days on that and proved that it really is junk.

It should not be difficult to build a very rigid machine at reasonable cost for the small size pieces you want to cut out, especially if you can reduce the 90 x 90 panels down to a smaller size on a table saw or similar. For a given level of stiffness, the price rises exponentially with the size of the cutting area.

Kit