[Destroyer]

Originally Posted by steplift20

That's a good idea, I'm just afraid of bending the tube but if I use rubber as a cushion that should help me and honestly I'm scared of screwing something up cause right now with the new cable it's so easy I don't want to mess anything up but I should be able to do that, dam it I had it moved over before and didn't even think of doing that Oh well I will do it now I just hope it turns cause now it don't

The rubber is more than a cushion... it's also a friction material with a higher coefficient of friction than just plain smooth metal on smooth metal.
(Like you would have by just clamping on the tube with bare Channel-locks). Put another way, it will hold better with less clamping force needed, which means less chance of bending the tube or damaging the threads.

Also, if you have a heat gun (NOT A TORCH) you might want to apply a little heat to the NUT first before you try to loosen it. The heat will make the nut expand slightly (a few thousandths of an inch), and at the same time, if there is any dried grease on the threads it will help soften it, making it easier to spin off the nut. (In much the same way that running a stuck jar lid under hot water helps loosen it so you can unscrew it).