Nardi Riviera FN-333 Landing Issues

[Dane SimAir]

I find that the FN-333 is almost impossible to achieve a smooth butter landing no matter what settings I use. The aircraft wants to "porpoise" uncontrollably during the last 10-20 feet before touchdown, at speeds from 65 - 85.

I can't imagine that the real FN-333 is like this (but I may be wrong), what are the rest of you finding.  If you are able to achieve a butter landing could you please share your tips.