Don/others, you have answered many of the sp400 questions I have had in some of your other posts. However I have many more. I am getting back into pylon (I am a retread quickie pilot), and I would like to try electric. I have designed an airframe (Don put a link my site that includes the plans) and I am more than familiar with the flying, but I am totally ignorant about the electric part. So here are my questions.

Do you suggest making your own battery packs, or buy them already soldered? What type of cells/packs should I start with, and what should a good pack cost to buy/build? What are zapped cells?
I have been offered an esc to start with. It has a built in BEC, and is rated a 30 or a 40. Is that a high enough level to handle a rocket motor on a good pack?
What kind of props are good to start with? and what keeps the prop sitting at 9 and 3 when not running to keep from breaking the prop or bending the motor shaft on landing?

I know I will think of more, but I bet that is plenty for now..