RE: RC Surfer
You are so lucky with the surf and weather conditions. It has been raining here solidly for many weeks and have only been able to hit the beach a few times.
In regards to your esc setting for lipo, I used to set them to 2.8V on the 2 cell 5000mah lipos, and 3.2v with the 3 cell 5000mah lipos. It is recommended they not be run lower than 3v a cell or you will damage the cell. I did notice that when I did run the 2 cells on the 2.8v cell cut off, when they did eventually run low (you will know this as they will run at about 20% of full power) the cell reading was 3.10-3.30 a cell. Anyway, best to set it to 3V and it will cut off when one cell drops just under, it will save your lipos in the long run.
I bought (years ago) 2 lipo chargers (they balance also, which is how i charge themevery timeanyway) for $40 each off eBay. They are great and having 2 gets me back out to the beach much more quickly when the surf is good all day. Grab an balancing cable extension so you can charge them in a lipo bag or a metal container as i do, so if there is a problem they will not burn down your house. I think too much fear is pushed onto those who first start using lipos with concern over exploding lipos. They will only blow up if you charge them on a non lipo setting such as on NiMh or NiCD for 10 hours.
You will be glad you made the switch to Lipos, they perform so much better than NiMh batteries and you can charge them again right after using them which is very bad for NiMH batteries. Plus they are lighter and will give you the Amps your motors needs to run faster! Mine are huge and weigh 420g, but the power and run time is great. My surfer weighs over 2kg, but it goes under the wave after a pounding an pops up behind the wave, where my home made surfer will get washed up on the beach as it is sobuoyant.
Your lucky to have someone take photos of your every session, you need to give them a video camera!!!!
Keep the pics coming!