Hi! I'm also trying to achieve this... I created a new custom param (Magical Hit rate - shortname: mhit) with this plugin and I'm trying to create a bridge Custom parameter in the VisuStella CoreEngine, with the JS: user.cparamBase(0). And then, I plug this in the Status menu window with the VisuStella ElementStatusCore.
It doesn't crash... but it only shows 0 for my new custom parameter... What may I be doing wrong?
EDIT: I should be using user.cparamBase(0) to obtain the flat property! Now is working like a charm, showing in stats menu with VisuStella plugin!