So the caps arrived today, more from Zedlabz, who I am beginning to rather like as a supplier.
In total, you need 4 caps (470uF low ESR) per Tokin. Don't be under any illusion the the Tokins will just lift off with a bit of heat, because the ground and power planes are huge, so need quite a bit of heat, and the Tokins are not solid, in fact even a little heat and the top cover comes off like the lid of a box.
So it's a case of using a combination of soldering iron, hot air, and a pair of tweezers to pick everything away. Once cleaned up, rather than put the new caps at an angle as some do, I decided to put them straight, and that meant cleaning up the large ground trace a bit further back from the original pad, but it was easy to do with a fibreglass pencil.
I tinned the +ve pads of the caps and the board, and soldered in that end of the cap, leaving a big enough gap between the ends of the caps to get in with a heavy chisel tip on my soldering iron for the -ve ends.
I had to set the iron to max and use a bit of hot air, but it eventually it soldered up nicely.
This is the end result:
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You can see the other Tokins under the CPU (There are another four on the other side of the PCB), but I was lucky, because they weren't needed and the PS3 powered on just fine!!!
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I was all ready to give the GPU a reflow, but it just works, so just makes me wonder how many PS3s have been scrapped like this, it's really not a difficult fix if you can solder and have the patience to pick off the old Tokins bit by bit.
To satisfy all the wonderers out there, I put down some solder mask on the exposed areas to prevent corrosion.
For some reason the DVD drive wasn't spinning up, but after a bit of a clean, it's all good now and works just fine.