I'm building Tamiya's Churchill VII with Eduard's PE set, and I'm in the process of forming the part (there are actually two of them) ringed in the photo from the PE to replace kit part B8. The PE instructions imply this can be built "open" or "closed". Can anybody tell what this thing is? I want to build the tank at rest rather than running, so should this thing be open or closed?
I've looked in the Osprey book on the Churchill, but can't find a reference in there. The photo's of Bovington's Churchill VII, taken when I visited last year.
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Thanks in advance,
Sean