we are working on some additonal tracking plugins for v4 based on the freeframe standard. everything works fine so far except returning values back to v4.
at the moment we use some nasty workaround by sending values via color changes in some pixels analyzed by pipet :)
we had a look at the trautner code , trying to reverse engineer the way to return values BUT it would be much faster if some expert could quickly explain the relevant code.
the plugins will be published of course :) soooooon