I don't see much more work needing to be done with these than the old Monogram kits.
The old monogram kits are great to put together, for their age the detail is really nice, but Gaston is right, they are horribly inaccurate and barely recognisable as a P-61. Check this photo
this is one I finished totally OOB a while back, and had a very enjoyable build, but if I didn't say anything you wouldn't even know it was a Widow !
I think there's room in the market for both in 1/72
Hi Mike. Doesn't the Dragon kit in that scale fit the bill?