Thanks Leatherback, much appreciated!
I also got a reply this morning from the place I've bought the tree from (Crespi Bonsai, a very reputable nursery here in Northern Italy), that everything is fine... so I'll keep on waiting for the leaves to fully open!
Hi LucR,
yes this is only my picture spot... the tree is of course outside all year round!
Unfortunately the balcony I keep my trees in normally cannot be accessed for restoration works, so I had to place them in the rear of the house and they'll stay there until autumn at least - good place for lighting and ventilation but not so suitable to take good pictures
Thank you!