Hi Neil.
If you are changing the VCU and mounts it maybe wise first to check the Uj's for tightness or even if they seem loose, if you do change them make sure you get good quality ones for the replacement link below, not an hard job to change but a bit tricky you have to tap them through one end until you can get the cap off then they release easy, also copper grease the new ones when inserting this is my opinion only, I am sure a more experienced member/owner will add to the thread.
Hi Neil
You almost certainly damage the Uj's removing them, I tried my hardest not to damage them when I changed all the prop shaft's and VCU on my FL 1 I bought the ones in the link to add to the rear shaft I took off so I always have a spare, in the end I found out I did not need the VCU as it was my rear brakes binding which was causing the judder, so I also have a spare VCU.
If you are having to change the front gaitor then it seems a good buy always nice to have a few spares