No I haven't,

It seems that gt looks either to self or opts instead of checking opts then self for the custom coding. The only way to keep GT's code in tact is to copy it into your plugin, but you'll need to do it for each one of their custom codes that currently exist and you'll need to keep on top of any new ones that they develop. So yeah, plugging into this section isn't really much of an option cause it means losing functionality. Hope this can be fixed so it works as we expect.

peace.