"what was bolted on rear armour" if its the drivers side rear it was a bren gun "AA" pintle mount, one was there one on the side and one on the division plate above drivers head and in some cases another on the engine top cover (gunners side) this is not concrete but on many i have seen this is where they tend to get placed.
imagine you had not come on here and cut her up buddy...... you can see why i get so passionate about making new armour for the chopped up ones rather than creating more "tubs" speak with Doug Lavoie regarding your other hull he may do a bit wheeling and dealing with regards to access to schematics
Richie