Been flying mine for 7 months now with a moki 2.10. The hinges that come with it are fine.
The moki 2.10 is the perfect glow engine for 3D with this plane. It keeps the plane light and
has plenty of power for 3D. Just don't go full throttle on the downlines. Then again, you shouldn't do
that with any scale aerobatic plane/engine combo. The 1.60 should be enough based on the latest review
in Model Aviation. However, if you go with something like a DA or ZDZ 50 you will have a much better
selection of other 3D planes for that engine if you ever tire of the DP extra. The only problem with a DA
50 on this plane is that you will be adding a pound of weight over the moki or O.S. 1.60, which will increase
the wing loading. It will still fly well with the DA 50, but 3D performance might be degraded to some extent.

Greg