Has anyone tried the Spark RC range extender antenna reflectors that are beginning to appear on the market?  Just wondering if they really work.

im going to guess not very well for a few reasons.  one reason is all the current mods are hit/miss with antennas.  they claim better range but showing similar ranges to what i have seen from standard anntennas..   2. another reason often overlooked is how such high signal bands act and react.. 2.4Ghz and 5Ghz bands are very very differently with reflectors and interference.     finally most of why the spark has poor range comes from how it channel hops and decides bands.  they need to update firmware and stuff for better more seamless channel hopping and allow more 2.4Ghz usage outside.