boy"O"boy's 1989 Serotta Off-road Pro-flex prototype

OK I'll have a go :) I can spot 6 differences:

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The forks on the production run bike (based on my memory of reading the build thread) are actually from a Slingshot (still True Temper steel) but lack the tapered legs and have quite a pronounced diagonal* cut leading to the dropout. *Forgot what the proper term is - it's late and I should be in bed! ;)
 
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