here is another cheap and effective SCX10 upgrade . I got it used for 16 GBP from the UK .
Axial AX30464 SCX10/AX10 CVDs
The cvds should improve the turn circle quite a bit in conjunction with the over drive front gears. I had a friend do a little mod to the GT2 transmitter to extend the endpoints of the servo, but to get the full throws i will have to get a better transmitter, probably a GT3c.
Whilst i had the truck upside down i have replaced the aluminium tubes on the lower links, the older ones were too big, the new ones are M4 sized and should slide better, also they look better . Remember to use safety glasses whilst using the Dremel ! I had a disk disintegrate today and fly directly towards my eyes , the glasses saved me .