Cuff problems (not only)

Hi, actually I wanted to “just” change the crossbars with my V2 … but then it looked (left) sooooo (photo). And as you can see, there must have been a cuff problem before my time, which was probably solved on the more inexpensive tour. I guess. The gearbox side cuff is OK by the way. Now I have my V1 standing next door in the open air – of which I have taken the ignitions with success last time – and his drive shaft left incl. Mansc Hetten looks original/complete and really good. Now my question: Do I now get a new GOOD replacement cuff or do I better build the (left) drive shaft from my V1 and in the V2? Have I read that you need a special tool to expand the shaft and detach it from the gearbox. Of course I didn’t. And also: can you just pull the cuffs off like that, or do I have to remove the tube clamps first? And how do you get that part back on? With grease(?) and new tube clamps? Thank you for your help, Jürgen