Therefore I want to add this to the PDF render, but I after ive been studying the source and the development articles in 2 days I still cant figure out how to do it.
Don't bother. It is already implemented in the new code. If you want to work at HEAD, you are welcome.
I came across a subclass*** Class BaselineShiftMaker* in the API doc but its not distributed with the snapshot of the source !?
It's code generated during the build.