One other thing to consider - is the Lunsford turnbuckle mod, I've found the standard CEN ones are utter crap, they bend just by looking at them.
I've read some people have put rods inside of them to strengthen them. Otherwise, see this link, scroll down and have a peak. A bit pricey but apparently worth it for the added strength and in the long run I guess it's be cheaper coz you don't need to buy new CEN ones after every run:
http://www.rctech.net/forum/nitro-of...rix-tr-20.html