Lucky,
Nor would I take such a chance - hence why I am researching here, seeking collective wisdom, looking for the evidence and not simply guessing or taking anyone's word alone for it - the original question was actually about structural strength. I intend to put in further queries to DVLA and Mazda to establish a black-and-white position before I commit to anything, and in any event common sense says to build to IVA regulations rather than cuffing it. However, there is much in the way of contradictory evidence out there (such as the road-legal Speedster when compared to the DVLA regs, and the old comments by ACE posted by Paul), and I'd like to understand just what can and cannot be done safely. I don't want to start with a 1970's rustbucket or someone's half-built coathanger collection on wheels, but I do want something I can afford and build without incurring a divorce, handles like the MX5s I used to own (and loved) and will turn a few heads at the same time.
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