Well... So I'm a little further forward with these.. Had a spare half an hour and thought I would go out in the shed and see if I could work it out! Guess what I did!! Chuffed with them how they are now.. Stripped down, re painted, new seals and new Pistons along with new bleed nipples.. Just gonna clean up my discs and use the original pads on the front as they were pretty much new anyway and then replace the rears for new.. The sake of £25 I've got 4 completely refurbished calipers happy days