Thanks for the reply! That was very helpful :-)
I will add that my stepchild is 3cm longer too. I have decided to go back to my Pandora and go with repitition until it becomes second nature then try again with my PMS :-)
I ride: NS Pandora 146 + Salomon Absolute premium Bindings
Stepchild PMS 149 + Nitro Eris Bindings +15 -15
Nike ZF1 5.5 & K2 Contour 5.