Like many things, it's difficult the first time, not knowing how deep to go etc but gently does it when it comes to breaking the back away the last shards of plastic hold on, once it's clear working on the other bits is clip out, clip in. Just two wires which are thin but ok to work with and it doesn't take much solder. Fitting it all back together isn't difficult, once assembled to the base and the wires attached test before sealing the unit up, as it happened even my unused tubes of silicone sealant had set hard! So I used the cut out shards of plastic to use as weld filler and with the use of a 30W soldering iron it was quite easy to set it all in place, luckily I found that some removable segments of a storage box were an identical or as needs be filler, I used much of only one segment then sanded the base and made a new gasket from some self adhesive Neoprene tape, wide enough to draw the gasket out on the backing paper then cutting it out, a quick clean up of the back face of the unit, using a dressing tool on the Dremel and it was on with the gasket and then fit. Crazyleds on eBay is the suppler but unless you have professional equipment and skill go for the assembled board, even if you have the skill and equipment for the difference it's worth going the same route in my opinion, there are 28 LED's and resistors and a slip on one means you're back to buying the assembled board. It's interesting to do things for yourself but his prices on doing a repair are actually pretty good.