Completed Working IAW Gulfstream drawing 11595640470 installed one -11 doubler, two -05 nutplate holder assy, one -15 contour doubler and one new XM Antenna PN C1420-1, SN 393565 at ES 174.25 and 1.B1.. 3.77. Combined total weight of install is 0.420 lbs. Seperate weights are as followed antenna 0.2 lbs. a