At the risk of being shot... how hard can it be? But I'm not actually talking about a regular frame, but a Recumbent Tandem Trike. Something along these lines of... http://www.eland.org.uk/jpegs/trike/trike.htm Which looks pretty simple to me, the main complication here is the steering joints. I've never really welded, although my dad and uncle can and it might be a good time to learn Other than a bit of geometry/sizing - any notes I should take in for consideration? Am I being overconfident entering a minefield?