More than 1 level of tuplets

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Hi all,

I want to have tuplets like this:

 |--------3:2---------|  (1)
 |--3:2--| |--5:3--|     (2)

and lily does it, but I am not able to put the tuplet (1). above the
tuplet (2). I have tried with something like:

\property Voice.TupletBracket \override #'extra-offset = #'(0 . 3)

but both tuplets has moved to the new location. I tried:

\property Voice.TupletBracket \override #'y-delta = #20

but nothing happened.

Any suggestions?

Regards,

Pedro Kröger