Probably just the wheel boxes worn. Two new ones and a new cable and you should be fine. Helped my son change his a few months ago in the dark and took less than a couple of hours
Sounds like a drip somewhere as the level should only drop if the pads are getting worn and the pistons are all further out which should take longer than 3000 miles
I am going to come out with the opposite view to the above. I have a 1.2 fitted to mine and it is great. However I will caveat that with a couple of things. I live in the midlands, not the Welsh or Scottish mountains, I have an early LT77 from a...