RE: Nitro Models Pitts-40 Special Design
It's somewhat pitch sensitive, due to it's very short tail.
This is by design so that the Pitts can do those awesome "tumble" manouevers that other planes cannot do.
If this is to be your first Biplane, consider something with a longer tail.
An Ultimate does not have an elongated tail like a Skybolt, but it would be better suited to be your first aerobatic biplane.
Even with it, there will be many new things you have to deal with.
A Skybolt tracks as if is on rails, but doesn't do many of the classic moves the Pitts and Ultimate can do.