There have been major changes to the firmware on that turbine. I had a flameout on a Bvm F4 (glides like a wiffle ball) as a result. If you buy it it, the pump and the Ecu have to go back for a resquirt. The changes I'm aware of handle how the unit deals with a static discharge. Before it would shut down. Now it goes into a known power (roughly 50% power) mode until it can reboot
Dave