now, better get back to the question.
I remember that Montolit had the problem, the measurement bar .for 45 ° cuts. if you measure the cut serves, with sigma, it is measured from the wall to the tip of the tile. the measure, it is reported, the measurement bar behind.
with Montolit, it was not possible, every time, I had to fix red bracket and then cut.
I do not know if the problem is resolved.
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