Yea, you're on the same wave length as me, just it's hard for me to picture as i haven't got the nosecone yet.
Could always cut the end of the tube the correct angle as the nose cone (and weld the nut to the same angle), then just use a bolt that is just long enough to go through the nuts if that makes sense.
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My Build Diary -
http://davesroadster.blogspot.com/
*updated 7/6/11*
Best bit so far: Getting it running
Worst bit so far: Cutting steel for wishbones and engine mounts.
Most annoying bit so far: Generator packing up half way through welding.