Yes- Its all about leverage- you can use screw drivers.
Unfortunately we no longer have the Tube release tools in stock as the Original XP and parts are not longer in production.
My recommendation having personally had this experience with my Original XP and no tools- I took it to a local hardware store and had them put it in a vice grip to release it for me.
Also try spraying WD40 around the seam and through the holes and let it sit- and try putting a cold icepack on the joint.
Hope this helps! Thanks!