Thx muchly for the help.
I've managed to get a custom column up and happening, so that is good.
Still surprised this isn't a standard option. There is too big a gap between say 3 and 4 stars (and the rest). All the sites/software I use have a decimal star rating. Don't want to sound too critical. It is free

and a fantastic piece of kit.
Do you know how to make the custom column report a value out of 5? Say...4.2/5?? I'd like the "/5" part to be automatic.
Again, appreciate the help. Cheers.