If you work a full tile from the back wall you will end with half tile to the front and as it is only 1700 wide 2 cuts at 850 wich you can cut on your 900 machinePlanks are 1200x200 and room is 3100x1700
Ill make a bench which I can connect my dust extractor to and use grinder.
Not the end of the world but effing annoying all the same