True, but your schematic shows 15k not 10k.

My apologies, I was working off another version of the schematic when I read your reply. So either 20k/10k or 30k/15k will give the required gain

 

My apologies, I was working off another version of the schematic when I read your reply. So either 20k/10k or 30k/15k will give the required gain

I built an evaluation circuit, as discussed. And it works well.
Thanks for the help and input.