Which roll cage for hillclimb?

[DanCat]

I'm competing in the road going class and need a MSA approved cage.
Someone at Gurston in April had just a rear cage fitted. I was thinking of just fitting a clubman age from custon cages. The CL3 seen here

http://www.customcages.co.uk/Rollcage/LoadRollCage...

To this i would add the standard three rear bars and single door bars. This would work out lighter and cheaper than the 6 point cage:

http://www.customcages.co.uk/Rollcage/LoadRollCage...

Now i know a cage isnt something to scrimpt on but for my needs i think option one would be adequate.
But would it it legal? Msa blue book appears to say yes- check out section k, page 23 a few configurations are shown

Thanks

[DanCat]

I have the seat and belts and will go for a hans when funds allow.

I know the cage isn't mandatory but it is probably a good idea, hence my question- which cage? I think i can make one up using the first option according to the blue book, I just want to check it will be legal.

thanks

[DanCat]

Ah, just seen the bit that it dosent have to be MSA approved, cheers Dan