Here I draw a diagram of the idea how I want it to work, correct me if there is a better way to do this.
I will use the laser pointer to find the origin 0,0 first
then move to point 2, compare this number to the actual drawing,
then go to point 3, if this 3 number match to one another, that mean the size of the print to the actual thing that put in the job table match, if not then I will modify the toolpath to match the measuremnt from the router table,
once this is done, it should be ok to do the cut.
is this logic sound right to you.
thanks.