Was not sure about taking on the job myself. With this kit the job is straight forward - watch the video and take your time. No need to dismantle the indoor unit.
I used a compressed air gun (carefully) to dislodge the dry build up on the fan first, this greatly reduced the amount of wet sludge during the wash phase.
Go to Bunnings and get a Nylex 2Ltr pump spray bottle to do the fresh water wash down.