well I followed jono's link from page 1 and it gave me (as far as I can see) the grid which is now on the site. Anyway, that's what I worked from. For anyone still struggling, I couldn't work things out from the idea of cubes but had to cut out two lots of three layers and hold them do I could see "down" them. Only thing I'm unclear about is I have a 3-letter link word which I assume must go with the extra word in 18 and is short for Robert but can't find a match in Chambers ...