voltage regulator

Have a GP3000 and looking at power options with some lipos, would like the safest set up as not to blow a fet or anything on the gp. Saw this little BEC from castle...Castle Creations CC-BEC RX Battery Eliminator Circuit

What the heck is a BEC? CC BEC Battery Eliminator Circuit is a little device that eliminates the need for a receiver and servo battery pack. It draws higher voltage from the motor batteries and drops it to a voltage level that is suitable for your receiver and servos. This is required in applications which draw high power for multiple servos or use more than 3S motor packs, as most ESCs with linear BECs are not designed for these applications. The CC BEC uses a Switch Rate method that is vastly more efficient than common circuits that sweat off much of your power through a heat sink.

Peak Current Output: 10 amps
Continuous Current Output: @12 Volts input 7amps, @ 24volts input 5 amps **
Output Voltage: 5.1 volts out of the package, user may set output voltage from 4.8 to 9 using the Castle Link (sold separately).
Input Voltage: 5 to 25.2v (2S to 6S LiPo)
Length: 1.2" (30mm), Width: .6" (15mm), Height: 4" (10mm)
Weight: 0.4 oz (11 grams)

What do you guys think, maybe its worth a shot for a variable input with variable output as well? Any tips or tricks on using a 11.1 volt lipo appreciated. Thanks Gravelwasher

Been doing a bit of searching for something prebuilt and came across this...LM2596 voltage regulator...Features:

Brand new and high quality.
Input voltage: 3.2-40V.
Output Voltage: 1.5-35V (adjustable) ,input must least high 1.5V than output.
Output current: rated current 2A, maximum 3A (need to add heat sink), if the output power greater than 15W, combined heat sink is proposed.
Conversion efficiency:Up to 92% (output voltage higher, the higher the efficiency).
Minimum dropdown voltage:1.5V.
Dynamic response speed: 5% 200uS.
Circuit protection: SS36.
Operating temperature: Industrial grade (-40 ℃ to +85 ℃) (output power 10W or less).
Load regulation: ± 0.5%.
Size: 50 mm x 23 mm.

What do you think, looks like just add a heat sink and hook up the input and out put, then set the voltage..?

lm2596 found a bunch of pre built adjustable units for like four bucks shipped, will one of these do me good? I am a bit worried about the khz noise they produce but will try. I saw the lm2941 but could not find it as a pre built board, so I will consider picking one up if the one I have on order dosent do the trick. Will keep you all posted on my progress, I dont expect it soon as it is coming from china. Thanks for the tips!!