I currently have a 2TB Hard Drive in my iMac and I use quite a lot of storage space. I do however want to switch to an SSD for the performance upgrade, but with the price of high volume SSD drives being out of my price range I've been thinking about a fusion. The thing is I'd have to use the PATA connector and remove the optical drive. So my question is, which is the best way to do it, do I put the physical disk onto the SATA connection and put the SSD onto the SATA or leave it as it is and put the SSD to PATA? I understand that the PATA connection will have a performance hit but is it likely to be significant? Is it even possible to create a fusion drive this way and will I notice the benefit? If it is worth doing, what size SSD should I go for, would 128 be enough or can I go smaller and still see OS speed gains? Lastly, is this possible to do without using another Mac?