At the risk of pissing everyone off...let me just say that I have heard that the castle BEC is a micky mouse unit and I would not run my 100.00 dollar servos with it. Nor would I use the UBEC ( I have one right here that is fried). I run a 50.00 dollar unit called the HERCULES BEC you can get them from brian at tanicpacks (worth a look) he claims that the hercules bec is the best currently made. Sorry if I come off as abrasive I just never got the hang of suger coating.