A while back there was a thread where someone asked how badly the 9500i's GPS reception would be if mounted high next to the tint strip or above the RVM. One forum member had an electrical engineer friend suggest attaching a choke to the 9500i's hardwired power cord and spacing the choke away from the 9500i by an integer multiple of the wavelength used by GPS, effectively turning the hardwired power cord into an antenna. Well, I decided to simply snap the choke in place next to the hardwire kit's remote display so that all of the power cord would be turned into an antenna.
I've been using this setup for a few weeks now and note that in the morning my 9500i consistently gets its GPS lock in a bit less than half the time that it used to take. And with Jimbonzzz's latest software which reads my 9500i's stored lockout and marked locations, I have been having a lot of fun marking locations and locking out locations in order to further decypher how TrueLock and Mark Location stores its information. When marking locations, I now notice that my 9500i accurately counts down the distance to each marked location with an accuracy of 200 feet or less. Most of the time it is closer to 100 feet accuracy.
So today I took the choke off and stored some new marked locations. Accuracy counting down to these marked locations dropped to anywhere from 200 feet to nearly 1000 feet depending on which direction I was traveling and whether it was fairly cloudy overhead. I can conclude that, when mounting the 9500i up high or above your RVM, installing a snap-on choke on the power wire and next to the remote display allows the 9500i to get much better GPS reception and allows it to know its position with much greater accuracy. Have you other 9500i users who have your 9500i mounted up high tried the choke idea yet?