Thanks Greg, but guess what?
BINNED IT!!!!!!!!!!
The rifle was a nightmare to fit and I caused quite a bit of damage fixing it into place. However, that was repaired to a reasonable degree, but then I found that the panzerfaust just wouldn't rest in the hands because the rifle was in the way!!!! I tried extending the right hand by adding a shirt cuff, but by that stage there's was glue everywhere and the finish was so compromised that it was pointless to carry on.
Sorry folks.