I'm plodding along building a 5" Britannia with the Norman Spink drawings which I aquired in the late 1980s. It has just occured to me that there seems to be no drawing for the steam dome cover which goes on the outside of the cladding. Does anyone have dimensions ? or am I just missing the item becuse mine are old drawings and newer ones have been corrected to include it ? I know that there were plenty of errors, I have found quite a few !
Further to this the boiler drawing (sheet12) shows a steam dome bush on the boiler shell top in dotted line detail but I can find no dimentions for that either, not that the dome is actually used because the steem collector pipe runs below and passed it on the model.
Any help from a previous builder greatly appreciated 
Rick.