haha spot on Vonasi, works now, thank you!

I had tried same / similar. but I can see now I was // out 3 lines too many in each code section with a GRAPH function.

Also I’ve now noticed that I was optimising over 10k bars only!

I was watching a good film at same time, but maybe I need to get my glasses from Australia! 🙂

Actually below are what I wear on the computer when my eyes are tired!  Pinhole glasses (£4 or £1 from china!) ,,, think physics in school and pinhole cameras and that’s how they work!  Well worth checking out for anybody who’s eyesight is not what it used to be!