If you're concerned about welding the steerer tube you could get one of these http://www.chainreactioncycles.com/gusset-universal-headlock/rp-prod17766 Although I dare say you could easily manufacture something that does the same job.
Good luck, it's an interesting project, like others I wish I had the tools and skills for this sort of stuff.
Some cool solutions out ha! That's pretty clever.
@Thrust started
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If you're concerned about welding the steerer tube you could get one of these
http://www.chainreactioncycles.com/gusset-universal-headlock/rp-prod17766
Although I dare say you could easily manufacture something that does the same job.
Good luck, it's an interesting project, like others I wish I had the tools and skills for this sort of stuff.