Sad really as the newer e-core tubes are fine. The original e*core tube was a problem
in some applications.
I wouldn't think twice about using a filter with the e-core tube.
Exactly right ^^^^^^^^^^^^^
The original ones were made a good bit stupid and welfare by not having enough interior reinforcement. That did make them weak and prone to having breaking issues. Since they have been rectified with a fair amount of added reinforcement on the inside those filters look extremely good upon cutting and opening them.