Use tail of DA40XLS as a flying radome?

[NZ5E]

I bought a 2009 Diamond DA40XLS aircraft that is going through annual inspection now as part of the purchase agreement.  I sent a Comant CI-292-3 bent whip 2 meter aircraft antenna to the shop that is doing the annual for possible mounting on or in the DA40.  Does anyone know if the composite material that makes up the skin of the tail is conductive?  Is there any type of conductive material sandwiched within or just inside the composite material that would block radiation?  I do know that there are some carbon fiber structural members that make up the airframe.  The mechanic thinks that he can mount the antenna upside down (similar to the intended belly mount configuration of the antenna) on the bottom of the baggage compartment, between the floor of the baggage compartment and the bottom of the plane.  He would be mounting some type of conductive material to the bottom of the baggage compartment floor to provide a groundplane for the antenna.  I am hoping that I can use the tail of the DA40 as a flying radome 

[NA0AA]

Without knowing exactly what the structure is made of - glass fibre or carbon fibre, it's hard to tell.  I would think Diamond would be glad to discuss this with you.  Given the huge number of antenna already on the average G/A aircraft.

[NZ5E]

Without knowing exactly what the structure is made of - glass fibre or carbon fibre, it's hard to tell.  I would think Diamond would be glad to discuss this with you.  Given the huge number of antenna already on the average G/A aircraft.

I will call Diamond on Monday.  I was hoping to find other amateurs/pilots that have a Cirrus, Diamond, or other composite airplane that have already tried inside antennas.