LeMans Bonnet Vents

[Alan Morris <klatka@earthlink.net>]

Moring everyone,
           I'm looking for the dimension of the Spitfire LeMans bonnet vents.  
The diagram I found on-line has them, but I'm not as young as I used to be and 
I cannot make them out.  Any help with this would be greatly appreciated.

                                     Thanks
                                                 Alan