Hi, I am reading this now, and I feel there is no point doing a new version of the 57-67-77.
All three planes have a climb' that is not realistic - no 4-5000fpm at FL250
The climb is controlled by the elevator using the available thrust.
All three planes should capture the Stars wpts.
the 57-77 should have the descent path like my 67
Otherwise they are great.!

In an effort to see if it could make a difference, I removed Accel from my FSX and replaced with SP1 + SP2. No changes, all remain the same.  Did not gain, did not loose, except a few airplanes I never flown.

Honest, my 67 is so close ! :o

Raymond     Boeing or nothing
KFLL      South florida