Please correct me if I'm wrong, but I have looked into this for a very long time
because I also prefer the H-B W.12.
I believe that the fuselage lengths are noticeably different and possibly more.
The wings are not even close in shape to each other.
OK, you made me look:
The W.12's length shows 31' 7 7/8"
with the W.29's length at 30' 8 1/8".
Perhaps it is the shorter rudder on the W.29 that loses a foot(?).
Maybe someone with a WINDSOCK DATAFILE can check the fuselage length and shape (angles) for us.
I would like to know.
Thanks in advance, Jay aka
FOKKERJ
P.S. MERRY CHRISTMAS