Roll-over hoop, braced or unbraced?

[aerosam]

Chris, sorry, I didn't mean to question your design, I'm sure the backstays make the car safer in an accident.

Andy, bracing all the way to the floor is also a great idea, but TBH the fuel tank area in mine is already very strong by vitue of the fact that it contains a honking great big chunk of BMW rear axle carrier in it.

As long as omitting the backstays does not make a hige difference to the overall strength of the chassis I think I'll go without.