I'm now making a Flemish harpsichord out of very light French poplar, specially imported from a little saw mill in the south of France. 
The case is made and I'm working on the soundboard today.
The instrument is 210cm long, 88cm wide and 26cm high, slightly smaller than the Delin harpsichord kit produced some years ago by the Early Music Shop. The most striking difference however is the weight; American Tulip Wood, often called Poplar, is much more dense than French Poplar. I can't stop myself tapping the case every time I go in the workshop to listen to how resonant it is!
Photos to follow.