[techie610]

10in. tires are to small for my liking. Barely like my 12s.. -_-
How much of a difference did you see when you put in the 2k Clutch Springs?
Might want to install a 1.5k Torque Spring, as well.
If you are happy with the 4g weights, then probably leave them in. Try 5g, for more top end speed. And with that, you should be fine in near flat terrain. If you do the new Torque spring, you might like the 5g weight better anyways.
What are your RPMs at when your hitting 45 and 50 MPH?
Also, maybe look into a more open exhaust system.