Brilliant, thanks!
The 1st link has comparison photos of the PSC and Old glory (which is a skytrex one anyway!). They look to close enough - especially once stowed.
All I need is 3xSherman II's so it looks like they should mix. I've been given (GIVEN!) 40 Shermans (I, Ic, II, V and Vc), 12 Churchills and 20 Cromwells / Challengers (plus enough infantry and supports for 6 battalions!!!!) - all in 15mm. The V and Vc will be for the Guards, but the I, Ic and II will be the Scots Greys in 4th Armoured Brigade. What I need is a few more II's for command bases.