I did my OE/cavern the week after you and found it to be most enjoyable. The Hardest bit was the climb to the silica mines with kit, but at least there was new railings to help up the slope. When I was there, a team of polish guys from london were unloading their van and car of wings with twin AL80s to trudge up the slope with and there was 1 in particular we overtook up the hill lying on his back gasping for air. The upshot of all this is that I am going to do the next level course after some more time in the water and a purchase of a sidemount harness. Thanks Martyn for a great course and for passing on some of your enthusiasm.