Finally, I was able to have time to do some test with 35.5 radar units and I'll make this short. Units tested were kustom talon 2, kustom golden eagle, decatur gen 2 using a patch antenna and decatur speed track with their cone antenna.
Conclusion: All 35.5 radar guns will cause the X50 and most likely the 9500i to double bogey in expert mode and frequency shift in spec mode from 35.5 to 33.690 and vice versa. I don't know the technical aspect of why it happens but can only give you guys practical and real results. At first, I thought it was just kustom radar guns. You can now include the decatur's too.
Thanks to 10-8 for letting me borrow his decatur speedtrack radar unit.
Bad part, off axis was terrible with just a very short distance. I'll take some video again tonight.