I made a new fuselage for the easystar to get more room for payload. This proto is made in 2 layers of carbonfiber. The carbonfiber is very easy to work with, so if any one out there like to make some modifications just go for it.
I got the carbonfiber from here
The weight of the T-REX fuselage is about 140g = 4.93 ounces - still need to make the inner fuselage so the fuselage can be fasten to the body and still be removerable. Think the whole carbonfiber fuselage will be about 160g = 5.64 ounces.