I just bought a J230-SP and the POH is lacking compared to the D model POH. My concerns are that it actually has bad info in it. It has best glide at 80 kias vs D model (and previous model J250-SP) at 65 kias. Other things are suspect as well. I know the tail had some redesign on the D but don’t see how that would cause such a drastic difference. Anyone have any knowledge on the subject?