Many tile stores speciality will cut your tile if you mark them, remember the sequence and do not charge you.
But, I have had allot of luck with the tile cutter blade that you attach to a hax saw and cut your own tile in place and at home.
Remember, the cut, yes needs to be nice and smooth and nice, but you also have the luxury of the grout to cover any small mistakes.
I use this method especially when the customer does not want the comode removed. It takes a few to get the hang of it, then on its easy.
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