Re: WTB: HDS 1x123 Knurled Tail - D type
I feel your pain, took me a day and a half to get mine off. Cold, then heat, then tapping or squeezing down on the cap, another good blast with a heat gun and then strap wrenches and it finally came off. Louie, another member, got his off by squeezing his in a vise and compressing it, I got mine off by tapping down on the cap with a rubber mallet. I think this step breaks the red loctite. YMMV.
If you've got the cash to bypass the frustration and have a willing seller, then go for it. Good luck in your search.