Converting single circuit brakes to dual

[Stuart]

has anyone ever had a second circuit fail on them?

I did and the other circuit didn't work either it clearly didn't do what it was supposed to do.

[MrBounce]

Well, I have bitten the bullet and gone for a dual circuit system (parts are cheap and easy to come by) and it is much easier than expected.

However, I have a small issue. The Master Cylinder is too tall! It's the "Yellow Tag" one from 80s Minis and sits about half an inch proud of where the bonnet would normally be shut. Can anyone suggest an alternative that won't break the bank? I suppose I could rmove part of the stiffening rib on the underside of the bonnet; is this how it's done on late model Mk2s or do the have a different Master Cylinder that's dual circuit?

Thanks.