Bottom UAT antenna should be the blade, 6' separation from the XPDR antenna is recommended.
No top UAT antenna required unless you reside in Canada.
GPS antenna on the top separated from other antennas as much as practical.
Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
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, Cell: 972-746-5154