Sport, thanks for the update. I too have had my Aresti out several times and it flies great. I have to adjust the CG on mine, it's a little nose heavy but I like a plane with a little extra weight in the front rather than tail heavy.
Mine rolls better to the right - a little sloppy to left. Got to work on the CG and aileron travel.

MY Aresti is basically stock. I changed the pushrods from the wood to carbon fiber Dave Brown shafts. The rest is out of the box.

Leo