Tried and not working. Probably its not so easy. Tried to change your demo canvas and result is the same.
Is this the issue you are having?
I'm not sure. But you didn't change canvas scale too much .. only 0.5 . change it to 0.001, 0.001, 0.001 and x positions of buttons will be 110000, -110000, 220000, -220000.
