Copy xlabel (ylabel or zlabel) Rotation property from one figure to another: why copyobj is not working? And how to work it around?

Dear all, I am facing a problem with some figures of mine and I would like to ask for your help.

I am generating a couple of 3D figures where x,y labels are rotated for nice plotting by +5 and -80 degrees respectively (by 'Rotation' property in xlabel and ylabel).

Let's say that each figure is in h(i) (i=1,2) handles.

Next I am creating a third figure where I am lumping both these two figures by the code snippet:

% New figure to lump the two subfigures into
g = figure;

% Target axes in the destination figure
ax{1) = [X1,Y1,W1,H1];
ax{2) = [X2,Y2,W2,H2];

% Copy loop (assuming only one axis object)
for i = 1:length(h)
    handle = get(h(i),'Children');
    newh = copyobj(handle,g);
    set(newh,'Units','centimeters','Position',ax{i});
end

In this fashion however I am not able to transfer Rotation properties of my x,y-labels in the original figures. How can I achieve this (i.e. how could I edit the code above and promptly copy everything - including labels - of my figures)?

Any help will be greatly appreciated.

Thanks in advance,

Maurizio