I'm trying to replace the CE2 in my MAP tank but I've run into a problem. The base of my replacement CE2 is not the same as the one I removed and it doesn't fit right into the delryn bottom cap. I took a picture so you can see what I'm talking about:
The original CE2 base is on the left. Is that metal piece on the base of the CE2 supposed to come off because it seems to be on there really tight.

The original CE2 base is on the left. Is that metal piece on the base of the CE2 supposed to come off because it seems to be on there really tight.