Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
I've for years used the original Honda box type spanner for these and they can be difficult if the threads are at all tight. Recently bought a pass through (hollow extension shaft and ratchet) socket set from Clahs Olsen shop, one of their own brand "Co Craft" sets which is the best thing I've yet found to get to all the plugs.It's also designed to flank drive bolts so will accommodate various states of rusty / knackered bolts under old cars etc. One of the best tools I've bought in a long time, my family are getting fed up with me telling them what I've undone with it.