I know that this one is not for the average Joe, but I've had two revelatons lately: the Ilford Delta XP2 black container lid works perfectly as a back cover for the 35mm f1.7 Voigtlander Ultron lens, while a Spitfire beer will fit perfectly inside a medium neoprene lens pouch.
In other words, I've just came back from Kent. And the Spitfire is really really good, just like its advertising.
"1949 -50 TSVVS - A remarkable camera taking the Contax bayonet mount and Leica body to produce a hybrid camera. Produced in very small numbers for presentation to senior officers in the Topographic Service of the army air force known as the TSVVS. A much modified Fed with brass body rather than aluminium fitted with a genuine Contax bayonet mount Carl Zeiss Sonnar f1.5 or f2 50mm lens taken as spoils of war from the Zeiss factory at Jena. Again a lot of fakes in circulation. The true origin of the TSVVS camera is still unknown. Two major circulating theories are that the camera has either been manufactured at Moscow's Almaz factory or it had been ordered for manufacture by the Soviets from East Germany (possibly Zeiss, but it is also not confirmed). This camera is probably the most mysterious in nature out of all Soviet cameras. An old belief that this camera was made by FED factory is disputed by the fact that the body is wholly made out of brass and it is different dimensions physically than the FED-1 cameras..."