Anti-wobble bed holders for Rapman

These bed holders/corners aim to solve the dreaded XY wobble arising from crooked threaded rods. They also prevent the upper bed from shaking with respect to the lower bed on the 3 sprung M8 bolts. Finally they allow fine bed height adjustment at 4 corners rather than just 3 points.
This is version 15 of my design and the best so far, but it does not remove wobble 100%. I am very receptive to ideas to improve it. To give you an idea of my early designs, here is a youtube video of version ~8:
http://www.youtube.com/watch?v=LSeArlGSxtA
Installing these will be a hassle the first time as partial disassembly is required to remove the original bed holders. However my replacements are designed to be easily upgradable so please bare with the pain :)
I realise there are a lot of steps below, but it is quite simple and a lot of it will be obvious just by looking at the photos. The only tricky parts you need to obtain are 12x linear bearings (the same type used on the X and Y belt idlers) and 8x 35mm-long M3 bolts. These quantities are for a full installation of 4 bed holders, which I recommend as it would be tricky to mix and match these with the original bed holders.
PS I have quite a few bearings and 35mm M3 bolts left over, if anyone in Australia wants some, just send me a message.