Dgar
Ozzie D, NP-hard 
Paul H π΄σ §σ ’σ ·σ ¬σ ³σ ΏπͺπΊBrilliant - you're raising a Class 1 Chemistry geek there!
Well done!
@Henrysbridge @dgar I try, tho I'm the black sheep, the non-chemist in my paternal line (otherwise rife with organic & physical chemists, and chemical engineers)!
Brilliant - you're raising a Class 1 Chemistry geek there!
Well done!