What sort of size is the nosecone?
I have just won a manky one on ebay, which is going to be the basis for a mould to make a nicey carboniferous one.
I don't mind cutting and shutting this manky one to get it to the right size, will be adding vents as well.
Cheers
Sean
PS - I know it's going to be really messy, but I like the fumes