Hi again,
thanks Andrew and Michael for your comments
Although I did not write any blog, I was working on and off on this build in the past years.
I did a lot of research on the mortar base, because it was not clear how the mortar was mounted. It was only recently that I finally found a photo which confirmed the look of the "Spezialbodenplatte". And I also found the measurements in a drawing by Hillary Doyle from 2006.
Here is a photo of the base which was found somewhere in France:
Here is my version in plastic, based on the drawing by Hillary Doyle:
The mortar was scratchbuild based on the Dragon kit:
And here it is test-fitted with the new mortar base:
The next thing was the front mounts of the mortar. According to the reference photo the front legs had mounts attached to the side walls:
Here is the version that I scratchbuild based on the photo above:
And with both sides visible:
I'll post some more steps soon
Cheers
Ambjoern