Installed the transponder antenna and connected it to the GTR35R, thanks to KSC for laying on her back under the aircraft holding the antenna in place. Spent quite some time installing the GMU11, not a pleasant job. It was very difficult not being able to see the GMU11 through the rear inspection panel. I did an alignment on the GMU11 after installation and it works OK. The transponder displays correctly on the G3X, so it also appears to be working OK, ( yes, I was on the ground ).