Sorry I haven't read the whole post...
But I have tried this and it doesn't work, the leverage is all wrong, lever like a rock even with a bit of air bled in.
But if you realy want your hs33 lever then use a julie caliper, the ratio is about spot on.
I use a Shimano deore 525 lever with a magura marta caliper and that rocks but I couldn't say it is better that the marta lever, I just had some bit in my box.
Hope this helps.