Hello,
You shouldn't ask for mistakes but for what is right.
What is your definition of a mistake?
Mistake in reference to it’s out of size fiberglass body instead of aluminium?
Mistake in reference to its rear flat 4 engine instead of a front in line 4 or 8 cylinder?
Mistake of a double torque bar Beetle front axle instead of a forged one piece steel axle?
Mistake to use all mechanical parts of a car that was build 22 million times to build something that should look like a Bugatti?
A VW replica is not really a replica for my opinion but a funny body on an old beetle chassis. It's something like a (bad) caricature.
The advantage of such cars is that they are that much out of shape so no one would take it as real.
You can get happy with such a Kit Car in a Kit Car scene but please don't mention the Bugatti brand name.
If your question was about what you can do wrong when building such a Kit, my answer is that most probably you destroy an original VW Beetle what is bad enough.
Greetings,
minime
