I have not tried printing TPU, but I have seen people successfully print softer TPU by printing an adapter for the extruder, like this one:
There is also a lot of other useful information about printing TPU in that thread
I have not tried printing TPU, but I have seen people successfully print softer TPU by printing an adapter for the extruder, like this one:
There is also a lot of other useful information about printing TPU in that thread