Discuss Cutting On The Curve in the Australia Tiling Forum area at TilersForums.com.
I tend to use a grinder for curved cuts, much more control than using a wet cutter and nippers. Instead of using a profile gauge, get yourself some thick lining paper and make a template, it gives much more accurate results in my experience of using both methods.
As Bri says, template for me as well, by far the easiest. I just cut some paper to the size of a tile then it makes life even easier.
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