magnetic interference with Garmin GMU-44

I am fitting up the Garmin GMU-44 in an RV-9A at the recommended location in the right lightening hole on the rear deck located just below the vertical stabilizer. I am also planning on having a manual trim system. The cable for the trim runs about 8 inches from the GMU-44. Garmin recommends 3 feet distance from metal cables. Has anyone used the GMU-44 with the trim cable located near it? If so, was there any noted interference? If there is interference, has anyone "Degaussed"sp? a cable? I am not familiar with degaussing, where/how does one do this (if necessary)?

Any thoughts would be appreciated.

Regards,
Jamie

Hey Jamie, this is what I used on my cables.
Prior to using this on my seatbelt restraint cables I got handheld compass swing but after degausing the cable, no magnetic swing.
So this should do the trick....I hope.
http://www.amazon.com/gp/product/B0..._m=ATVPDKIKX0DER&pf_rd_r=0V3GTKVYGATXMC9KC7K5
Regards

If you are far enough along with the system's wiring that you can power up the G3X, there is a built-in magnetic interference check in the software that you can use very easily to see if you even have a problem or not. You'll have to run that before you can calibrate the magnetometer anyway, but you can use it when you get the system powered.

Paul