Rotation via G68!?

[thefresh79]

Hello everyone,
i'm brand new to uccnc and the axbb-e controller and have a small question.
my current workflow is that i attach a rectangular workpiece to the table (usually with adhesive tape) and it is not 100% straight. i then touch it with my current software and a 3d probe at two points each on the x and y axis. the software then automatically rotates the coordinate system and sets x and y 0 to the left front corner.
is this also possible with uccnc? if so, what is the easiest way to do this?

many thanks in advance and best regards, dennis