Hi Andy it wasn't that hard really but just a little time consuming. It took a couple of hours. Got a squeezey bottle with a little washing up liquid and water in and then raised the suspension and squirted it onto the bag and cradle to see where the leak was. It was right at the top of the suspension cradle so wasn't the bag that was leaking. After removing the suspension strut the top cradle is held on with 3 13mm bolts. The seal is under that and is really easy to see and remove. I put a little sealer on the new one just to make sure it sealed properly. To remove the bag in case that's what is faulty on yours it looked like a nut in the centre under the cradle would need taking off to allow it to slid off. It was all fairly straight forward and obvious what needed taking off I wouldn't be worried about carrying it out as long as you have a good selection of tools. I used my mates garage and his air tools. I also replaced the pump on mine which was on its way out which was under the car on the drivers side. All the pipes for each corner of the car run from there so if you can't see any bubbles from your suspension have a look there as if it can leak on that connection too and have the same result.