Updating firmware with a different USB/Serial converter

Has anybody used a different USB to serial adapter to configure or update the 3dr 915 MHz radios?  I don't currently have the FTDI cable but I have a boatload of PL-2303 based serial adapters that seem to be basically the same thing.  Is there anythi

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Issues with kmz files created with Mission Planner

I have a few problems with the kmz files that are being created by Mission Planner (from onboard *.log downloads), I was wondering if this is normal behavior or if I have something configured wrong.  My issues are:

1. All altitudes are set to relative

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