Thanks for your kind comments guys, the derek base mould was cured this morning, so I got the first castings done this afternoon, it's always gratifying when the first castings of an item come out OK, and I made up the first cast base, also got the strd aft derek base done, this is bigger than the other three and as there is only one I'm not bothering to take a moulding, next will be the derek "arms" the two forward are the same, the two aft are different from the forward ones and each other, I'll make them all out of styrene sheet, that I've just noticed I've nearly run out of.