I also found a video on YouTube by a crazy Czech guy about a write up and test of 600w 12v Smps which looks almost exactly the same as mine apart from the input filtration. This one has IRPF460A mosfets. I will check these out for similarities to mine I watched a lot of his videos and although a bit crazy he seems to be quite a knowledgeable and entertaining chap. The first photo is mine and second is his.
https://youtu.be/DzM3-bnotgQ
I also have a couple of bulging caps to replace.