I cube cut many plugs and its the primary way a smoke Cob and Grousemoor plugs, its just a different cut and different cuts affect the burn and flavor of a tobacco. As Derrick suggests a flake that is then cross cut will give you a cube cut. I cut a semi thick flake off the plug and then cut across to give me a cut that's easy to load and light but keeps many of the slow burning flavor characteristics of a stuffed flake.
Bearing the burden of responsibility..... It's probably my fault.
Treat your silver as if it were earthenware and your earthenware as if it were silver - Seneca, Letters of a Stoic