That’s great thanks. And as @EdamllamaB says this will probably work with the GTN750 which we can probably hack the aircraft to get a working autopilot too 
The Garmin 750 costs almost as much as the aircraft does in real life!
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I love that IRL Garmin makes aviation smartwatches that have this level of GPS + aviation map in them, you can buy one and use it with multiple ultralights! 
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Yes I do and have done so. It’s pretty simple.
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- Make a backup of the Aerolite “sound” folder. For my install it is located here:
D:\Steam\steamapps\common\MicrosoftFlightSimulator\Packages\Community\nemeth-a103\SimObjects\Airplanes\NemethDesigns_Aerolite103\sound - Go to the Drifter “sound” folder here:
\Steam\steamapps\common\MicrosoftFlightSimulator\Packages\Community\antsairplanes-drifter-a-582\SimObjects\Airplanes\antsairplanes-drifter-a-582\sound - Copy the “AntsAirplanes_Drifter.PC.PCK” and the “sound.xml” file from the Drifter “sound” folder in Step 2 to the Aerolite “sound” folder listed in Step 1. Overwrite when prompted.
- Now you need to update the “layout.json” file for the Aerolite 103. I use this app as it has more functions than simply updating the JSON file. https://www.msfsaddons.org/freeware/liveries-manager
- Open the Flightsim Liveries manager app, select the “Create Layout.Json” tab at the top left then click the “Select Folder” button on the right. Navigate to “D:\Steam\steamapps\common\MicrosoftFlightSimulator\Packages\Community\nemeth-a103”. You should see a “Content, Guages, Misc, and SimObjects” folders is the selection window. If so, you have the correct folder. Click the “Select Folder” button at the bottom right of the selection window.
- You should see “D:\Steam\steamapps\common\MicrosoftFlightSimulator\Packages\Community\nemeth-a103” in the folder path field of the Livery Editor now. Click the “Generate Layout.json” button and you are done.
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THANK YOU SO MUCH! THIS WORKED GREAT!
I love flying the Aerolite as it’s great for sight seeing- low and slow
BUT the misfiring 2-stroker engine sound NEMETH used is gad awful and detracts from the enjoyment. I was to the point of just muting it which was less than ideal.
The Drifter engine sounds so much better! I even bought the Drifter just to try this fix and now my Aerolite 103 sounds so sweet and way more realistic (love the pitch changes during elevation changes) I LOVE IT!
Thanks again for the excellent workaroud!
WOT
GTN 750Xi - $20,000 
+installation
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Depending on your aircraft and whether there are existing wiring and harnesses from an older install that are suitable, or you are starting from scratch, the install could be a few thousand.
In the case of an Aerolite 103 it is not clear to me it even has an electrical system capable of handling a GTN 750XI .
Does anyone know where we can find a manual for the round GPS instrument in the panel?
This is the only documentation I’m aware of:
The gps was a later upgrade.