eeek, While I'm not pro Pro-line, pun intended. I am an advocate of Ulimited Engineering. Check out their site at
http://www.unlimitedengineering.com/
Also check out
http://www.maxxtraxx.com/
While my opinion that unlimited's upgrades are quite the Ferraris of the world you also spend a little more. Check it out and form your own opinion. You do have choices. Once again you get what you pay for.
Butch R