Well, I assume that's what they are. Looking at the uneven heads and the metal there it seems as though. The greeny round things at the bottom of the block... Tried using a dremel to cut an indent into them and using a flathead screwdriver to get it out. Doesn't seem to be working. Should I just fork out and get some easyouts? Or is there another trick to this? Only other thing I can think of is punching and drilling a hole into it from an angle, sticking an alan key in and turning out. But they feel veeeeery f'n stiff. Or just impact drive the bastards out?