dotticom ...
Could you be a bit more specific? The problem appears when you retract the flaps from what setting between 205-225 KIAS? Is that from Flap 35?
Also, it's okay to retract the flaps either below 205 or above 225 KIAS? It's just within that 20-knot speed range that the problem with uncontrollable nose-down pitch occurs?
Is this in the book, or is it something you are told about and shown on the sim course for the 560XLS?