BEV: They always get "crimped" from someone pinching the hose with pliers trying to get the hose loose. You need to make it round again. This is assuming your word "crimp" means squeezed to an oval shape or pinched shut. If you are describing something else you will have to be specific. They both have a retention/seal lip (bulge) on the end. Find out where he got the core. Never saw any for TF. Or is he "making" one? Did he actually find one yet? The source for that would be a great addition to this post.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn