Custom fire task _fw_name

I am trying to use one concrete class implementation of the custom Ftask for different types of tasks:

In essence I want to leaver required_params and optional_params and run_task method intact but to change on invocation _fw_name naming the task differently.
FiretaskBase meta class will allow me all kind of weird implementations of Ftask class including dynamic implementation of actual task via type builtin.
It actually works for loading mongo queue via launchpad.
However Fireworks and launchpad on monitoring of queue can’t find that dynamic class in path via _fw_name attribute and no combinations of dynamic class names and _fw_name will allow me this.
Is there anyway to solve this outside of changing load harness for Fireworks …
BTW, I know of all the possible ways to utilize FW_config configurations …