Basically WFA races etc. can have 8 to 9.

I don't think I can help you Vortech, sorry.

5 kgs for a dump might be a bit too much. From what I have seen the dumps that most of them do are verging on being scoured.

I thought it was a certain weight range that was the ideal, not a specific weight. Could be mistaken though.

I could do it ..... WFA etc - rounded to nearest 1% - SA LOT 37%, VIC LOT 20%, NSW LOT 23%