-
As fun as this sounds (genuinely) I think I'm the kind of person that would burn through waaaaay too much time dithering around with all the different options. And I probably wouldn't come up with anything as pretty as the Nervex design.
That said, I don't particularly like the Nervex seat lug (or at least the bolt hole) and the ebay set doesn't come with a bottom bracket shell or fork crown, so I'll have plenty of opportunity for dithering with options anyway.
I quite like the fork crown from a Bob Jackson Vulcan:
mmmmmmm, pointless ornamentation! ; )
Buy some cheap standard lugs from ceeway and get some good needle files, a sharpie and a small metal saw (dunno what the English name is). I bet you will be entertained for hours designing your own. There's loads of info and inspiration online.