HAGSTROM KEAD6 USB POT INTERFACE

I want to build a throttle quadrant to control two engines throttle, prop, and mixture using the KEAD6.
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https://forums.simviation.com/phpBB3/viewtopic.php?f=10&t=28642
I have talked to Hagstrom and they will not commit to any specific ohm values other than a range of 500 to 1m ohms.