Thanks all for the additional help.
The difficult part of all of this is the size, weight and shape of the speakers. It's not as easy as just measuring the sides etc. The Sopra 2's really have an exotic shape.
I have tried to zero in on exactly the same distances, side to side, distance to front wall, toe in, and listening position. I think I have it!
Funny though, just moving one dimension can throw off the other distances.
ozzy