So I decided the stock Summit VXL rear was sagging too much for my liking. Upgrading the springs and shock oil made a HUGE difference in my 1/10 E-Revo. Went into the LHS yesterday and they sold me 1/16 tan and black. But after installing, things got worse!
Come to find out the springs were almost 1/4 inch shorter, being designed for the MERV. On top of that the stock blue have a higher rating. Now I have to wait for the purple ones to be shipped out in February 2011. LHS is giving me a refund until then.
Here is a helpful link for those interested: