The transpiper installs fine and easy, but in my case it didn't make much difference. The thing that made a difference for me was removing whole heatpipe assembly, replacing TIM and then replacing heatpipes and sinks. Out of the bos, the sink bolts were loose and needed to be tightened.
Putting Ram sinks on the CPLs dropped my pwm temps too. Of course airflow through there is the most important thing.
Then again this new transpiper is maybe much better.