Yes I'm aware and am using a Novak LIPO low voltage circuit now.. I'd really like to know a little more about ESC's that are available.. The one (FUTUBA?) that is offered by Aquacraft is more like an on/off switch than I like.... This may be due to the Brushless motor magnets close proximity to the windings. In many Brushless motors they free wheel to a degree unlike the motor used in the Aquacraft.. ie. Novak's that I'm used to racing Oval with. You couldn't use this (cogging) in a race car because it would instantly spin when you let off the throttle!!LOL!! I've looked at the Castle Creations Hydra's and I'm sure that they are a little more sophisticated than RTR supplied ones... A little more pricey too!!LOL But like in any other type of R/C hardware...You get what you pay for!!!LOL Are there any others out there that I could consider???