tony_sheehan said:Sounds like a square of thales might be of some help:-
Good stuff.
But it assumes that all the cabinet parts you cut out of your beautiful sheet of plywood will remain dead flat all the way through assembly. That's often not true in my world. I've installed many cases that turned out looking great but on which this Square of Thales device would fail pre_installation. That's what screws and clamps are for.