I have built a Lark, not aware of there being a 3D version.

Have only had a couple of flights, and you can tell that it is way too heavy.

Ahh, found the Lark 3D on their website. Different plane to the one I have.

I would say that as it is an ARF or ARC you try the ARTF section of RCU. Or try the 3D flying section.

Sprink