[BrianG]

If you did burn out the BEC, there is something you can try. It may or may not work depending if there is a diode in the circuit.

First, fix the problem with the soldering issue.

Then, try plugging a receiver pack directly to the throttle cable. For test purposes, you will need to wire up a female to female servo cable adaptor. But don't remove the red wire in the ESC throttle cable. If all is well, the receiver pack should power the ESC's internal circuitry.

If you see any sparks when you connect the Rx pack, disconnect immediately as there is still probably a short circuit somewhere.

If it does work, you can use an external BEC to power the ESC. Just plug the ESC throttle into the receiver (remove the test adaptor you made) with the red wire intact. Then plug the UBEC into the battery slot on the receiver.

The reason for the test servo adaptor: if there is still a short circuit in the ESC, you don't want to fry the receiver's circuit traces from the excess current flow when you hook up the Rx pack.

If you need more clarification, let me know...

Or, if you don't want to go through all this, contact Castle for warranty work. Even if it is out of warranty, the manual states they will fix/replace out-of-warrenty items for a flat $50 fee. Pretty good price really.