Just a thought here since you did not indicate any particular design or possibly is it a conversion from coventional gear to tri gear, perhaps a 'bash' of several differant major componets?

The reason I ask is you only seem to indicate the tail heavy condition by the landing gear tilting. Any conventional airplane needs to balance from about 25% to 30% back from the leading edge. In other words about a quarter the way back from the leading edge on a straight cord wing. If the any of the above has taken place then perhaps your main gear is to far back. A good rule of thumb is to always balance the aircraft in the above percentages of the wing cord and then consider the landing gear position for good flight and ground handleing chacteristics.

If this is not the case then please forgive me.

John

correction to the above paragraph, should read 'then perhaps your main gear is to far forward'