Wogster,
Are you aware that the OP is 450 lbs.? While this doesn't effect the principles that lead to a durable wheel, does it cause you to believe that he might be a good candidate for at least as many spokes as most would recommend for a tandem or loaded touring bike?
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Birth Certificate, Passport, Marriage License Driver's License and Residency Permit all say I'm a Fred. I guess there's no denying it.