Thank you muchly, I was watching the third utube tutorial to work out what I had done wrong.... not checking for activation of the ability !!!
Blade Singer now usableNow to copy a few feats and hope someone figures out the Eldritch Knight. But I am not sure that is possible without some way to add spellcasting from a class ability.
It's doable, though annoying. Lots of cells in the spell mem matrix to fill in, so if you don't organize your code well it can be easy to get lost. I recommend going by class levels, and following a pattern of ascending spell levels.