I have a couple of original Radiguet engines. If I were you, I would stay away from this heavily modified machine. It has many original parts, but also many freelance after market machined pieces. I would not consider this machine as a Radiguet, but a machinist machine, it lost its identity, and historical original value.
Yes i am agree - but it is very hard to find untouched Steam engines of that age.
Second - the seller is a very difficult person who does not know what he wants - so it is quite possible that I will have to refrain from it.