So it was oozing by the threads on the barrel. I think because the ptfe (white tube thing) got too soft at temp over time. I put a hose clamp on it and have been slowly tightening it over the past half hour.
Hopefully by now the abs has been sqquished out and its tight.
We shall see.
These extruders are the weak point. I think next cahs influx its time to get one machined out of aluminium. Same parts, just not plexi.
Since I can get the cad files it should be affordable.
Now to try a test build.