Part of the problem is that I need to use a formula that can then do a separate average for - G9 G58 G107 G156 G205 & G254
Similarly again I will need a separate one for - G10 G59 G108 G157 G206 & G255
and again for - G11 G60 G109 G158 G206 & G256
etc
all the way up to - G54 G103 G152 G201 G250 & G299


Hence I cant use a G8:G253 style range.