Did as suggested using the C337 - Default GNS - everything works. Install F1 GTN 750 - Everything works (GTN is blank due to trainer issues but I can still tune the radios). Replace F1 GTN with RXP GTN using the utility provided - problem.
I then used the configuration and panel files that Bert provided - problem solved.
Bert suggested I use the same RealityXP.GTN.ini file for the D18S, did that - problem on the D18. By looking at the panel.cfg files Bert sent me I noticed that the F1G
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