I have the Mini Avanti coming for my Wren 44. I will be pushing the engine as far forward as I can. The inlets do not look structural so I will be cutting the tops of them away. Can you confirm if they are structural? I will be using a 32oz dubro tank sideways with no header tank. I will be using a GBR filter clunk.

I weighed my Wren44, accessories, tank, and pipe. It came to 54oz. My Jetfan 90 with speed control and 6s5000 battery weighed 54oz. So the only difference should be fuel weight at takeoff.