@pglewis - My very few successes a number of year ago used a POA system but not using pairs, using a single letter so 3 letters per image. I think this was a major reason for such a low success rate as a rigid 3 per image did not help with parity etc.
I have had a demotivating few days with very few successes and lots of solves where I haven't even finished memo because I cannot think of suitable images or sentences, ones where I have odd/even for edges/corners and solves which when finished have lots of missed targets which I can only assume was a bad setup or alg. Slight redemption with a success an hour ago but I do feel I am probably trying to do full solves too quickly. I need to work on so many areas of my solves that I really need to split up practice to learn some areas quicker.
Not sure what will help. Doing corners only and edges only? Tracing alone? Trying to commit more letter pair images to memory. Any tips greatly appreciated.