Unfortunately, the inclinometers in FSX don't always accurately represent uncoordinated flight - they're over-reactive. Unless the developer has tweaked the ball action somehow to look more realistic, you pretty much have to rely on visual tracking of nose movement. As far as altitude performance, normal tuning of the airfile will typically give you either realistic low altitude performance or higher altitude climb/cruise performance, not both, so it's a compromise. Just a problem with FSX code.... like almost anything in FSX there are workarounds, and there are a few developers that have succeeded in building realistic thrust/drag modeling throughout the performance envelope, notably Milviz. I don't do coding myself, just flight test, and not in a position to pass on 'trade secrets' on how to fix this model, but it is exceptional work and I'd love to see the few bugs worked out! Thanks for posting Deacon, hopefully the developer can find some solutions.