Received a copy of the Haynes "build your own sportscar" book last night as a birthday present 
Have to say im quite impressed so far, although I havent had much time to read through it.
As ive mentioned elsewhere on the site, I want to build an MK indy, I dont really have the skill to make my own chassis as I cant weld, but the book
is still useful.
Anyone on here built the haynes roadster yet? and is it much different from the earlier ron champion locosts?
I think ChrisG might have done. 
Several people are in the process of building it. There is a forum for the roadster
http://www.haynes.co.uk/forums/forumdisplay.php?f=1
The book has a few errors which are documented on the forum
quote:
Originally posted by scottc
I think ChrisG might have done.
I say go for it and build the roadster - currently I assume you may not know how to build a car...but you'll learn! 
Welding is a skill I learned through necessity (it being the mother of invention and all that) and it has saved me hundreds of pounds, and you only
learn by doing new stuff!
I am biased though, I've got half my steel and am currently getting bits sorted and tacked together...
go for it i didnt even think i would have got this far after a few months. i could weld but didnt think i could be anygood at the angles and getting
things square so give it a bash. the steel for this has cost me £56 so far a lot less than i thought it would be
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I think there is company that sells the haynes roadster chassis so you wouldn't need to weld 