hello Dillyman after reading your discribtion I realized that I have seen a bike like that on zolder in belgium in 2007
I was standing next to it before the start of the our classic race and it looked hugh and long.
A friend of mine took the picture and I can't remember seeing a more weird construction apart from a bohmerland maybe.
As you can see it is a rene gillet that is all I know about it,I hope this will help, regards george the second
ps I have more pictures but need your private e-mail to send them (better resolution)