Well, I was too cheap to spring for the razorback. Instead, found the other, older discontinued Hanger 9 P-47 with the later style canopy. Seems a lot was bought from likely HH, and sold on EBay at a discount.
The older version is somewhat different in construction, and has a slanted engine mount. Since I intend to go electric, some research disclosed that the electric motor "kit" for the razorback is appropriate, and can
be used. Much less expensive than scratch building the box, etc.