not much... i have the same, aviomodelli version, and it does not fly very well... it is an honorable trainer, but for pattern.... Aviomodelli did too much changes on the design,probably to match their industrial process and the name of calypso is the main relation whith hanno prettner s ship...
The main problem are the wings, rather typed for a motorglider than for an aérobatic aircraft...
It flyes, anyway, but its not a very pleasant airplane even if it s easy to fly...