Delta3 - I am sure it is a very clever simulator but does it show roll towards the advancing side during a transition? If not then your sums (advanced as they may be) are wrong.
In my humble experience, the problem with simulators is that they are just computers and, like any computer, if you put garbage in you get garbage out.
Many full-size sims costing millions still can't replicate the actual handling qualities of a specific helicopter because all the data has to come from an instrumented aircraft of the same sort to be accurate, instead of the data being modelled with clever mathematics.