I have a few photos of the limber in France 1940, plus in Len Trawins book, Early QF British Artillery, there are scale drawings of the limber and ammunition wagon but in WW1 cofiguration, with the spoked artillery wheels.
The basic layout is identical, the Martin parry conversion I did for Resicast, in 1/35th.
The same as for the 18pdr, the existing axletree was used and the "MP" hanger used with pneumatic tyres fitted. It appears the same size tyre was used on the gun and limber.
email me at
george.dfs1@virginmedia.com
Regards
George