Can we ask what size tiles you are planing on and if you have a pattern in mind?
Or if you have multiple-sized tiles for your pattern....if so, you might be (depends on pattern) bound by the math-work that determines the grout width for you. If this is the case, tell us what you have and we'll talk you through it.
Tonto Goldstein….. but my friends call me Bubba
"The best way to get a bad law repealed is to enforce it strictly"
- Guy on the five