Trimmed the GPS mount to fit onto the top firewall stiffener without interfering with the stiffener rivets. This involved cutting slots in the aft L-angle on the GPS mount to go around the rivets. Once the trimming was complete, I drilled out two AN3 bolt holes in the GPS mount and the flange of the top stiffener. All that's left to do is paint the GPS mount ... when it's both drier and warmer.
GPS mount with bolts through the top firewall stiffener just in front of the nosegear shock.
The GPS mount sits in the open space behind the engine and will be under the top cowl.