Hi Andy,
For the caps kit, drop Martin (member username Dillion) a PM to ask him. I also got a kit from him for my BM6000 and it was a very reasonable price. Not to mention that it comes with nice coloured, clear instructions and diagrams for installation!
As far as an easy job this depends on your experience and how much spare time you have, I not having any, sent mine to a repair centre. The older gentleman there was quite experienced with componant repairs, but he found it quite time consuming (doubled with a busy period at the time, it took him a while to finish) , I think probably for the reasons Fredrik has mentioned as its quite fiddly getting all the boards in and out.
That said, my unit sounds real sweet, smooth and effortless now!
Best you get the kit and have a look and see if your able to do it, and have a repair guy on hand just in case you can't.
Laurence.