2. What are some good chargers in the 130 range?
If your willing to spend $15-$20 more, the MRC Superbrain 989 would be a pretty good choice IMO. It does 1s to 8s lipo and comes with a nice power supply. I haven't heard any negative things about it. I'm thinking about getting one to replace my ICE charger (which is also a great charger.
Here's a link:
http://www3.towerhobbies.com/cgi-bin...&I=LXLTW4&P=ML
5. How can I make a battery tray? Where can I buy one if I can't get materials?
If you can't get materials, I think Mike does custom work. From what I've seen, it looks really nice and pretty durable. There are a few pics of his work in this thread:
http://www.rc-monster.com/forum/showthread.php?t=8292
Hope that helps a little.
-Brad