Graupner has got a nice LVC!

[Serum]

Yeah, it's the easiest to make your controller/ubec/fans/LVC one device.

The Ubec/controller/lvc can combine the receiver wire. (it's not the 6V voltage that drops when the LVC 'kicks' in. the output of the ubec can be used to power 5/6V fans, and the input leads of the speedo can be used to take the measuring voltage from the LVC. that's what i thought about doing.. But you don't want to void any warranty, right?!

The gps is unneeded, since you got a GPS for your eagletree.. (not for the micro, though)