The Side Power Controller on Ladybug, Too was a victim of a lightning strike. Try U S Thrusters for a good price on a replacement if needed. Mine was the dual joy stick version. Incidently, the electronic interface module on the forward thruster also took a hit. The interface lists at $130.00 and the joy stick lists for about $530.00 but you can find a better price. If you can give me some symptons and what you have tried so far, I may be able to help you confirm that it is the controller. I pretty much memorized the wiring and operation of mine before I got it running again. I had a low voltage issue too that was related to improper grounding at the thruster battery (my bad). The interface module contains one amp internal fusing and when it goes the thruster goes.
Pat, Ladybug, Too