I did my tension square last night, and after expert advice, I am about to cast on tonight in DB cathay in a purple colour on 4mm needles. Given my past experience with frogging lace patterns, I hope this one goes ok, but I've read the pattern and think I can manage YO, K2tog.
I've never done backward loop cast on either, but just had a go and think I've got it. Mine looks a bit loopy though, is it meant to be so? *feels a bit dim today* ;)