I've tried to implement this fix but I'm coming across an usual issue. I think it may be related to the fact that my fiscal year starts in Apr?!
The solution above works perfectly when using the FiscalMonthNumeric (See the top two charts in the attached) whereas if I use the Month field, it works until I get to January, it then puts January's data in Q1, Feb in Q2 and March in Q3. (The bottom 2 graphs in the attached)
The only difference in the two is one dimension says